Then you measure and add up the total square footage of each competitor and divide it by the population in the 3 and 5 mile radius.

Even if I didnt get a variance from city to do same MFH, I could build a SFH home with the same square footage, same number of bedrooms and separate kitchens and bathrooms, would just have to have common utilities so it's technically a SFH.I'm more concerned about worst-case scenario planning for things I just don't see.

@Frank Fiallo In general, one finds the value of residential by the rents and a commercial space by its return per square footage, and then the two figures are added together for the mixed use building. 

What's the square footage?

He got the square footage data from the central appraisal district. 

Would the added sq. footage increase the overall value on a 1:1 ratio?

This can be done by the square footage leased by each tenant.  

each individual is required to have x amount of bedroom square footage in an apartment.

I don't know the details of the property but the problem sounds like counting the finished basement as above grade square footage.

$850/month for $88,000 (or less) seems high for a mortgage payment, even with taxes, insurance and PMI included.If you could post the zip code, sq. footage and bed/ba, that would help us locals determine more realistic numbers for you.