I think the issue wouldn't be that nobody wants to pay, but who exactly would be interested in a male hooker that physically cannot close their mouth.* There are plenty of Ed Buck-types out there that would pay a premium for that.
* On another note it baffles me that he doesn't do
something with his gaping maw. Orthodontic elastics could at least keep his mouth closed and they are super simple to remove. You could go hi-tech and hook up a TENS module to fire the muscles his brain can't. Some kind of Bane like chinstrap even. For fuck's sake, even this would be an improvement:
View attachment 2545589