Plenty of restrictions....Arlington only allows in a specific area. 

https://www.biggerpockets.com/blog/the-silent-war-on-tenant-...The Silent War on Landlords That No One Is Talking AboutIt’s no secret that legislation regarding tenant screening is becoming more and more restrictive.

Quote from @David Kulbacki: I have never heard of any platform restricting a guest from signing an agreement.

HOA prices and restrictions is probably the next biggest thing to pay attention to as they will have a lot of influence on your profit margin and growth potential.

Punctuality issues  family restriction issues so on and so forth.

Risk:Retirement communities often enforce age restrictions, thereby limiting the potential tenant pool. 

Still looking for an automated tool for STR regs where I can just plug in a zip code or address and it will layout all the current restrictions in seconds. 

You get around the AirB&B zoning and current & future local laws & restrictions...

The city also has a lot of restrictions on STR rentals. 

My primary issue at this time is the lack of inventory and the 1031 timelines makes it difficult.Some might say to 1031 into DST's or OZ funds, but there are so many arguments for and against, especially since some have restricting or stopping their distributions lately I've heard.