Oh no no no no no no no!!!! Exploiting women so that disabled men can get their jollies? What about men who are just plan ugly or lacking in the personality department? Should they get sex workers provided for them too?
There are plenty of people in this world who may struggle to get sex through the usual channels. But turning to paying some poor woman who has no other way to earn her crust? Wrong wrong wrong!
Sex is not something that should ever be bought. If you can't find a willing partner yourself, masturbate. Even if you struggle to masturbate with your hands there are plenty of sex toys that would help.
How about using the money to train the sex workers in a real job so they don't have to sell themselves to survive?
Or, if disabled people really need help with sex, spend the money on developing sex aids they can easily use.