Google Texas Penal Code Prostitution. This will give you a good idea of the elements of the offense.

Stay away from girls involved in drugs...young girls because of trafficking...low budget motels...

This will save you a lot of grief. Drugs..young girls and cheap motels attract cops. My best friend from HS been a cop in Austin for 15 years and he gave me that advise. He believes adults freely hobbying should be allowed.