There are many I'm a part of like "STR Homes for Sale" and "Florida Off Market Real Estate" (I'm sure they have groups for different states) that offer a great array of off market and listed deals.

I know they won't say what the client's Coverage D policy states, but I'm sure with the right kinds of questions you could get enough info to figure out how much they might go up to.

Real estate laws are local to the state where the property is located.

And when investing out of state, make sure to work with a local trustworthy professional who will have your best interest and understands your needs. 

Primary residence mortgages require you sign documents stating it will be your primary residence and you'll live there at least a year.

There will be some customary fees that hit seller side, but this is may vary state by state.On both buy and sell, you will have things like wire fees, maybe underwriting fee, etc, but these tend to be minimal.Holding costs: HOA, if you have one.  

Keeping with the 4 plex scenario, State funding via MEDC pitching in 50% of that 1M  (500k) once the Certificate of occupancy is received.

Most of those specialty programs (first responder loans, downpayment assistance, etc) are based on local state/county grant programs that back the loan.

This period typically lasts for the first 20 days the property is listed (30 days in certain states).

I don't know your state but I suspect you would be breaking some law, as you are likely unable to legally market something you don't own or have use and possession rights.