I reached out to my CPA and he was able to confirm my marginal tax rate!

@Cristian Escobar you are likely correct but you'll want to confirm which laws govern and ensure they are followed. 

Karl, I wanted to confirm; is it possible to do multiple FHA loans?

Either way, I also discuss with the Owner at this time what the market suggests the new asking rent should be, and confirm his strategy for the foreseeable future regarding hold, sell, or whatever in order to (hopefully) not spring any surprises on new tenants.Owners are welcome to provide us with contact info for their preferred vendors, but we let them know that standards must be met with regard to timeliness of repairs, interaction with tenants, and, if we will be paying the invoice out of their income, they will need to be properly licensed and insured.

If a contractor gives me a bid that I know is outrageous I can just walk outside pretend to call my husband and walk back in and say "hey, I confirmed with my husband that we only pay x/sqft for tile flooring, so that's the best I can do".

If at some point they become damaged beyond a threshold (like 50% for example) then you would need a permit to rebuild the damaged unit, and when you go to pull that new permit THEN you'd be subject to modern zoning overlays and no longer grandfathered in.As to what to do with this information, I can neither confirm of deny anything above.Burn this after reading. 

BUT you first need to confirm your property is zoned to allow the additional 4th unit. 

BiggerPockets.com has an excellent BRRRR software that you can use to help with this. 

I was confirmed and scheduled for closing on December 22.  

Whats a good skip trace website or software ?