I changed my major in college back in the day because I couldn't handle minoring in mathematics. 

On the surface, your purchase and rental price spreads look nice but your stated financial terms are all over the place , particularly the 2 separate dollar values you provided for net worth (net worth is not variable but rather a single mathematical integer) and Cash Flow.

This is instant return to your family and if you eliminate 18% interest on a credit card, that is a hard return to match with the amount of effort it takes.Third, I would make sure you have an emergency fund so that you can pay for any unplanned expenses that arise.You can focus on the highest interest rate debt first, which makes the most mathematical sense, or you can eliminate the smallest debt first for a feeling of accomplishment (Dave Ramsey method).Also, I am a firm believer that you cannot cut your way to prosperity.  

Mathematically they could do 10+ projects but we settled on 8.

My day job involves identifying fraudulent documents, so it helps tremendously, and most fakes have spelling, punctuation or mathematical issues, or are just badly done overall, but there are situations where I am in doubt and would love a 2nd opinion.

That is how you know if something is a good deal or not... it’s whether it matches your strategy to achieve your goalA rental property is very simply mathematical equation.

I am not saying don't buy turnkey but if one wants to compare to the averages on returns to LA, SF or San Diego historically there is a very clear mathematical answer.

For example, if you have a background managing properties or working for a large financial consulting firm or studied migration patterns with a PHD in mathematics.

But also you can more easily pull that money back out in the form of a HELOC much easier from a primary home compared to the rental.So in the end do you want peace of mind or mathematical optimization (which some would argue is leverage even more!)

I know they installed rear unit completely new roof in 2017, so the roof in front unit is the main concern for me that will need to be replacement in future, what I am thinking is that if I back out, I lose 11k, which the flat roof in front unit will cost less than 11k, I think you got great point here and I probably will stick with inspection in future, but mathematically speaking I was leaning towards account for roof replacement in future ?