First time seeking SW

So I'm trying to verify some of my supposed local SWs and I'm finding a theme where their phone numbers are linked with another SW thats completely different. Im using Tryst and trying to follow the tagged guide in the subreddit. One told me they buy their number online but it just strikes me as sketchy.

Also, is it normal to do a 30% deposit (total is 400) then be asked to pay for the hotel for incall? I'm interested in this idea here but it all seems a little precarious. Any thoughts?