I have seen a gentleman bound to a wheel chair before when I was touring Manchester, the only warning I got was "I can't walk very well". He got to me and told me he couldn't feel from the chest down, so we had a drink and a chat in the front room which moved onto the bedroom. We spent a lovely time together, I must admit I thought I was a little scared I would hurt him or make him leave feeling sexually frustrated but I didn't. He stayed much longer than he booked for, I seem to have verbal diarrhea, and left very happy.
I don't "specialise" in seeing disabled people, expsically from home as I have a three bedroomed house with steps to get to it, but I would never say no to someone who is disabled. I have seen TLC's website too, its brilliant.