I agree with the others here that say you need to have some skin in the game, if you are going to live there yourself, get an FHA loan rather than owner financing, you can get a 3.5% down loan, personally I do not love these as they require  PMI which is an additional expense, and you also need  bring additional funds for closing at least for taxes, title, attorney and transfer fees . borrowing from anyone else for the down payment, to include a personal loan from the bank is not a good idea, those again will be higher int. rate.

You should always require them to add you to their policy as "additional insured" or "additional interest" and you will be notified if they cancel or change their policy.

I pull permits for removal of load bearing walls, addition of bathrooms or bedrooms, addition of footage.

Otherwise, you may need to replace a water service (13-15k), electrical service (10-15k) and upgrade wiring (This is a tough one, but maybe an additional 8-15k inside).

@Colleen F. unfortunately, AFAIK, there is no other resource than go to small claims court and go after her, which will take me $2-3K in additional legal fees.

There are also additional costs of operating and maintaining an LLC, like separate bank accounts, annual report filings, tax filings, etc.2.

Additionally, there was no business license registered in the City of Atlanta.Suspicious Communication: The individual identified as Chris Anderson had a heavy foreign accent and provided convincing but dubious claims about the company's legitimacy.Questionable Financial Arrangements: Upon loan approval, the wiring instructions directed the loan fee to a Capital One checking account under the name of a supposed loan facilitator—a 85-year-old woman in Florida.

Highest number of units without getting into commercial buidling codes at 4 units you have additional engineering requirements. 

I was fine with all these numbers.Then I met with contractors...First, I wanted to add a new bathroom and approximately 450 sq ft of additional living space.

I created a co-hosting profile as I was looking for additional opportunities.