I answer specific texts, but messages asking me 'where are you' (I'm outcall only), or 'are you available?' will get my standard reply advising to let me know their requirements, to phone, or look at website.
I also have regular clients I will make arrangements with by text, they put the info I need into the message, if anyone starts chatting on, asking one thing then another then they will have to phone. If I'm driving on the way to a booking, or anything else then I don't answer texts, I might pull over to ask them to phone, some will, some carry on texting and I can't do anything about that. There's enough clear info on my profile, so it's not as if I'm leaving them blind.