FHA now allows us to count rental income from an ADU (additional dwelling unit) to help borrowers qualify.

Also, you will have additional occupancy tax depending whether you are in the city limits or not.

In addition to checking Airbnb monthly rates, I checked the MLS to see what monthly rents were.

So the major issues in a house are a foundation issue or a structural issue, the next tier down would be a mechanical issue like Electrical, Plumbing, HVAC, then roof - which isn;t an issue a new roof is very common in a fix n flip, and then the outside facade: Brick repair, driveway repair, brick pointing. 

I haven't heard of the ability to add additional $250k primaries, but I'll have to dig in to try to learn more about that!  

I'm not trying to be negative or dramatic, but this is a very common way for people to lose their life savings.

Mortgage lenders will qualify you for a higher purchase amount for multis than they would on a single, because they will count the rent you will be making on the other units as additional qualifying income for your loan application.

If anything, have a small sign in front of the house that says who the builder is and phone number (that's common for contractors to do, and also so that neighbors feel they have some to call if there is dust blowing from the site or whatever), and then you may have people calling you asking about availability (people always want something more that they had to chase and can tell their friends the story of how they got the house). 

But if I decide to pay an extra $2,000 per month, in addition to my (dropping month after month) minimum interest-only payment, when the loan is recast to principal and interest, the new payment will be based on the remaining balance ($396,000) spread over 25 years.

Additionally, a CPA can maximize child tax credits, rental property depreciation, and ensure compliance with reporting requirements for their 1099 income.