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

This is required for most landlords in the city, as part of the rental property registration program.

We will always require at minimum 10% of a down payment for a purchase.

I actually like them because the homeowners' association (HOA) usually covers most of the insurance, and there is very little maintenance required.

Looks like a good service but they seem to require a minimum of a 100 doors?

I suspect it's an old line that failed and required replacement.

Will the title company put this property under our LLC name, and won’t be required to legally inform HUD/tax authorities. - will it influence property taxes once we move to conventional loan in 3 yrs? 

As for non-bank loans, I'm familiar with a loan program that provides 100% financing, but it requires a minimum 650 credit score and proof of funds covering 12 months of interest.

You are required by law to send  1099 to the government, and to the vendors if you have payments of $600 or more in a calendar year. 

What documents do they require, what credit scores do they allow, how do they verify previous rental history, etc.?