I use iGMS to manage my STRs and really like them. 

Does anyone have a system they use to filter through the endless available markets and narrow down your options to something a bit more manageable?

Other things that are red flags for me: Their bios don't even mention how long they've been managing other people's money. 

Lastly, find a property manager that matches what's most important to you.

I'm currently also the property manager. 

Also, if anyone has gone through a similar process before, what is the cleanest way to break from a management company that are currently managing several units of mine?

Given this I know I will need a property managner/property management firm at some point.

When looking at out of state STR Loopholes the IRS is more likely to question how you are materially participating and managing the property.

If I'm trying to determine how much to rent an LTR for I'll also use Zillow to see what others are asking for similar homes and how many people have reached out & applied.If I'm trying to determine how much to rent an STR for I'll use the enemy method, AirDNA, and estimates from property management companies.

Are property managers required to provide leases to property owners in PA?