Look for any clauses about rental caps, short-term rentals, or owner-occupancy requirements.

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

Most states require a RE license and or Broker’s License.

Reason is a Heloc generally carries a higher rate on a shorter term and "Can Never" be used as an "Asset, or for PITI reserves" which are both required when you buy an investment property. 

It is pretty easy to keep it fully occupied but it does mean I turn away a ton of people who want a lease that doesn't quite fit my requirements. 

Do DSCR loans qualify if purchasing through 1031 w/debt-carry-forward requirements?

It's definitely possible to get a loan as a foreigner but the rates will be high(er) and the downpayment required will be as well.

I'm being required to pay another application fee and then $600 application fee to hopefully get this approved by the Board to allow me to continue running the STR that they approved 6+ months ago. 

Success in real estate requires courage, perseverance, and the willingness to take calculated risks.Internalize these principles and apply them in your real estate endeavors, and you will be on your path to success.

But It requires an endorsement.