Know Exactly What a Deal Is Worth
Before You Spend a Dollar
Three plug-and-play calculators that underwrite any multi-family, rental arbitrage, or Airbnb deal in minutes — the exact tools Peter & Georgie Schielke use to evaluate every property across their 20+ rental portfolio. Enter your numbers. Get your answer. Invest on data, not hope.
Secure checkout via Stripe · Instant access · Built by investors managing 20+ rentals
Peter & Georgie Schielke | Founders of Block & Barker, 15 years in real estate, 20+ rentals managed.
0+
Rentals Underwritten With These Tools
0
Years in Real Estate
0
Deal-Analysis Calculators
$0+
Saved By Avoiding One Bad Deal
The Problem
Most First Deals Fail
Before The Offer Is Even Made
You can’t tell a good deal from a money pit
Every listing looks like a winner in the photos. But without NOI, cap rate, cash flow, and cash-on-cash return in front of you, you’re not analyzing — you’re guessing. And in real estate, guessing wrong doesn’t cost you $27. It costs you tens of thousands.
Free spreadsheets and gut math get expensive fast
The free templates floating around YouTube are bloated, broken, or built for a different strategy. One wrong formula or one too-optimistic occupancy assumption, and a “cash-flowing” deal quietly loses money every single month you own it.
Sellers and agents only quote best-case numbers
The pro-forma in the listing assumes perfect occupancy, zero repairs, and peak nightly rates. You need to see the deal in conservative, realistic, and optimistic scenarios — so you know what happens when reality shows up.
Analysis paralysis is costing you deals
While you second-guess your math for the third weekend in a row, an investor with a clear underwriting process runs the numbers in ten minutes and makes the offer. Confidence in your numbers is speed — and speed wins deals.
Sound familiar? Underwriting a deal should take minutes — not weekends.
The Calculators
Pick Your Strategy.
Underwrite Any Deal.
Each calculator is a plug-and-play underwriting tool: enter the numbers from any listing and get your answer in minutes. Buy the one that matches your strategy — or grab all three and save $34.
Multi-Family Calculator
One-time purchase · Instant access
Underwrite apartment and multi-family deals in minutes.
Enter your numbers and instantly see NOI, cap rate, cash flow, and cash-on-cash return — so you know whether a deal is worth pursuing before you ever visit the property. The same tool Peter & Georgie use daily to evaluate opportunities.
- Net Operating Income (NOI) at a glance
- Cap rate on any asking price
- Monthly and annual cash flow
- Cash-on-cash return on your down payment
Secure checkout via Stripe
Rental Arbitrage Calculator
One-time purchase · Instant access
Get into short-term rentals without buying property.
Plug in your rent, startup costs, nightly rate, and occupancy to see your monthly profit per unit and how fast you recover setup costs — so you only sign leases where the spread actually pays.
- Monthly profit per unit
- Startup-cost payback timeline
- Nightly rate and occupancy modeling
- Know the spread before you sign the lease
Secure checkout via Stripe
STR Purchase Calculator
One-time purchase · Instant access
Pressure-test any Airbnb or STR before you buy.
Enter purchase price, financing, nightly rate, occupancy, and operating costs to instantly model annual revenue, cash flow, and ROI across conservative, realistic, and optimistic scenarios. Invest on data, not hope.
- Annual revenue projections
- Cash flow after financing and operating costs
- ROI on your total investment
- Conservative / realistic / optimistic scenarios
Secure checkout via Stripe
The Investor Toolkit🔥 Best Value — Save $34
All 3 Calculators
One-time purchase · Instant access
Every deal-analysis tool in one purchase — Multi-Family, Rental Arbitrage, and STR Purchase calculators. The complete underwriting stack Peter & Georgie use to evaluate every property before investing a dollar.
- Multi-Family Calculator — $27 value
- Rental Arbitrage Calculator — $27 value
- STR Purchase Calculator — $27 value
Secure checkout via Stripe
Secure checkout via Stripe · Instant access · Built by investors managing 20+ rentals
How It Works
From Checkout To
Your First Underwritten Deal
Three steps. About ten minutes.
No spreadsheet skills required.
Pick Your Calculator
Buying apartments? Multi-Family. Leasing units to run as Airbnbs? Rental Arbitrage. Buying a short-term rental? STR Purchase. Comparing strategies — or want the full stack? Grab the Investor Toolkit and save $34.
Check Out & Get Instant Access
Secure checkout through Stripe. Your calculator is delivered to the email you use at checkout, ready to use immediately — with simple instructions included.
Underwrite Your First Deal Today
Pull up a live listing, enter the numbers, and get NOI, cash flow, and returns instantly. Green-light the deal or walk away — either way, you’ll know, not hope.
Multi-family · Rental arbitrage · Short-term rentals · Works in any market
Peter & Georgie Schielke
Founders & Real Estate Coaches | Block & Barker
Who Built These Tools
Hi. We’re Peter & Georgie. 15 Years. 20+ Rentals.
We’re Peter and Georgie Schielke, the husband-and-wife team behind Block & Barker. For the last 15 years we’ve worked in real estate — managing commercial properties, acquiring and operating long-term rentals, and building a portfolio of more than 20 short-term rentals.
Every one of those deals started the same way: with the numbers. Before we visit a property, before we talk to a lender, before we get emotionally attached to a listing — we underwrite it. These calculators are the exact tools we built for ourselves to do that in minutes instead of hours.
We started exactly where you are: wanting to build real wealth through real estate but unsure whether the deals we were looking at actually made money. These tools remove that guesswork. Enter the numbers, and the deal either works or it doesn’t.
Our goal is simple: help you invest on data, not hope. Whether it’s your first deal or your tenth, you should never spend a dollar on a property you haven’t underwritten.
Questions
Before You Buy
Instant access to the calculator (or all three, with the Toolkit), delivered to the email you use at checkout — along with simple instructions. Enter your deal’s numbers and the results calculate automatically.
If you’re buying apartments or multi-unit properties, get the Multi-Family Calculator. If you want to lease units and run them as short-term rentals, get Rental Arbitrage. If you’re buying an Airbnb or STR, get the STR Purchase Calculator. Comparing strategies or not sure yet? The Investor Toolkit gives you all three for $47 — $34 less than buying them separately.
No. These are built for first-time and everyday investors. You enter the numbers from a listing — the calculators do all the math and show you the results instantly.
No — these are the standalone deal-analysis tools. If you want hands-on, one-on-one help finding, analyzing, and closing your first property, email pschielke@blockandbarker.com and ask about coaching with Peter & Georgie.
Still have a question? Email us at pschielke@blockandbarker.com
Your Next Deal Deserves Real Numbers.
Get the complete underwriting stack Peter & Georgie use on every property — the Multi-Family, Rental Arbitrage, and STR Purchase calculators — for $47. Instant access. Results in minutes. Never buy on hope again.