Research better assumptions before you trust the numbers.
A calculator can organize the math. These guides help you find stronger inputs, understand what they represent, and identify the uncertainties worth testing before you rely on the result.
Start with the assumption you need to verify.
Each guide answers a specific pre-purchase question and connects the research back to the free Rental Deal Quick Check.
- 01 / Guide
Seven Numbers to Check Before Buying a Rental Property
Build a practical review around purchase price, rent, financing, operating costs, and cash required.
Read the guide - 02 / Guide
Rental Property Expenses: What Should You Include Before Buying?
Separate operating expenses, financing, and upfront cash, then find better sources for each assumption.
Read the guide - 03 / Guide
How to Verify Market Rent Before Buying a Rental Property
Compare leases, rent rolls, listings, and local evidence before relying on an asking-rent estimate.
Read the guide - 04 / Guide
What Vacancy Rate Should You Use for a Rental Property?
Choose a vacancy assumption using property history, comparable leasing activity, and market context.
Read the guide - 05 / Guide
How to Stress-Test a Rental Property Before You Buy
Test rent, operating costs, and management assumptions to see how much room for error the deal has.
Read the guide
Use the depth that fits the question.
Enter supported assumptions in the free calculator, then move to the Rental Analyzer when a property merits a documented review and deeper scenario work.