This can change the math pretty quickly.

On Page 134, he lists the following when analyzing a deal:Sales Price: $132,490.00Sales Expenses: $17,000.00Loan Balance: $55,004.72Total Invested Capital: $35,950.00Profit: $24,535.28I agree with his thought process here when he calculates net profit, but I'm trying to verify the net profit by adding up all the sources of income over the past five years in his example by doing the following:Appreciation over five years=$12,490 (see chart on Page 133).Cash flow ($297.73x12x5)=$17,863.80 over five years.Loan paydown: ($60,000-55,004.72)=$4,995.28 over five years.Sales Expenses are still $17,000.Doing the math, profit= $12,490+$17,863.80+$4,995.28-$17,000=$18,349.08There is a $6,186.20 difference from the net profit he calculates.My question is: Is this $6,186.20 difference due to the forced appreciation gained in the property from the rehab he does in this example?

While the math per door is roughly the same, my thought is that I will have more doors still rented while I renovate one, and the overall costs for maintenance is roughly the same. 

Per door does not change the numbers but makes it easier to do napkin math and for people to grasp.

Folks have a hard time with Math..

As a creative professional historically "allergic to math," I never thought I'd consider real estate investing, but life is full of surprises!

I have to agree with the math from @Don Konipol.

$500,000 after taxes is likely close to $325,000(maybe more or maybe less).Assuming cash-flow from rentals is offset by depreciation, you would need $325,000 of annual cash-flow from the rentals.If you can get $200 / door / monthYou would need 135 doorsYou can work on this type of math to figure out how much rentals you need.Be mindful that rentals require some type of work.

So unless the Fed is willing to start dropping hundreds of basis points at a time and without doubt unleashing a significant inflation "spring", or Fed's stepping in to convey some form of CRE finance relief something...... well the math is clear, Q1/Q2 '25' is gonna get real interesting real fast for Commercial Properties. 

The math isn’t mathing.