I will give an honest suggestion if you are looking for semi pros. Post an ad yourself on BP. In the casual encounter section, the adult gig section. You can make reference to willing to give a small compensation.
You are just going to be hard pressed to find the type of ladies and prices you are looking for, here on TERB or with regularly advertising BP ladies.
And I would recommmend not insulting professional working women with emails or texts with requests for lower rates then what they advertise.
As I said in my first post. Good luck .