HUD doesn't have the ability to implement rent control anywhere other than government owned or specific government financed housing.

The DSCR (the ability for the rent to cover your mortgage) will impact your rate, so the higher the DSCR the better.

To me the biggest risk to STRs is the municipalities shutting down the ability for owners to rent homes out short term. 

circumstances.. education.. personality .. innate abilities.. lack of understanding basic math..desire .. drive.. familial pressures..  

If so, does it also tie up the tenant's ability to obtain a moving permit?

A large, deep and qualified network of "intermediaries" to provide deal flow OR the ability to spend $5 -10K PER MONTH on obtaining that deal flow. 5.

The reason I am posting is because I've received some contradicting information about the ability to refi my property after adding ADU's.

However, the state legislature is currently reviewing a bill to eliminate 30 day rentals.  

We receive a bill pay type check via USPS.

I specifically need really user friendly accounting features (including ability to sync with quickbooks and print checks directly from the site/software), customizable online application, and online rent-pay as an option (hopefully with free or very cheap ACH).