Sounds a good idea Alan,you would need to give a lot of thought to your business plan, banks aren't what they used to be. These days they have you by the short and curlys. You wouldn't want it to become a cock up.
There is a lot of scope there, a lot of guys would cum at least twice a week. Have you gave thought to unisex ? It is worth thinking about. I come from a family of pet lovers, being the youngest and the only boy, I always got the job of grooming pussy.