Get out, Dominate, Conquer! 

I am thinking that the BIGGEST players are those you never hear about.They are quietly making a fortune in their corner taking over the world!

All markets are simply supply & demand + price discovery; a major player just moved to only one side of the market.

There are a lot of established players in the space that have reputations with wholesalers and cash to buy.  

There are some very strong players in this post.  

You just have to go to the auction and see who the players are. 

To @John Underwood's point, Airdna isn't entirely accurate but they usually come in on the low end so you can always use this as a baseline.Also go with any one of the vacation rental insurance providers he mentioned.Airbnb charges you 3% if you're a small-time host, or 15% if you're a bigger player.

Of course in most major cities in Texas buying these before and during foreclosure is dominated by a few big $$$ players

The Roku interface allows incredibly easy access to cable, streaming apps, and/or other devices such as DVD players or gaming systems, without having to switch inputs or other things guests may find confusing.However, I also agree with @Nancy Bachety that it's about knowing your guests.  

There are at least two players in this space.