Secondly, the appraisal often notes functional obsolescence because of this and a lack of a common area.

Microsoft Excel, and most budget or free online bookkeeping isn't going to cut it in this situation.For the rental properties you own directly, I often tell clients and prospects that a P&L in Microsoft Excel is just fine and a balance sheet is not necessary for tax purposes. 

And as well as that, ask around like you are now!

I was able to sell the SFR for $62,000 with a wrap around $50,000 mortgage at 12% interest and a pre payment penalty if paid off before 10 years.

However, if you’re interested in a very specific type of property and a specific type of sub-market, it will be very difficult to find a wholesaler that meets your needs. 

Using this to measure cash flow and a few other metrics seems to make most properties I run numbers for very good opportunities.

Assuming you've met that, your original loan amount was ~$364,500 with 10% and a purchase price of $405k.

See, it's a snazzy start-up where everything is remote (besides their main office in SF) and they got da fancy "algorithms" & da nifty "machine learning" with a coefficient quadratic equation here and a pythagorean theorem there that tells them what rent should be and tenant profiles you should look for.

I've faced some large insurance claims in the past and a public adjuster may be helpful in maximizing your insurance payout. 

If you finish the basement with a kitchen you could have a mother in law with a walk out and a garage downstairs.