I would say if you just want a wash/clay/wax then you are probably better off doing that yourself. I did it to my car about a month ago and it didn't take nearly as long as I thought, ~2.5-3 hours for a good wash/dry with leaf blower, clay by hand and wax by hand. A detailer will likely charge you 150 bucks or something outrageous like that. I probably used about $30 in supplies.
That said, if you really want to pay someone to do that call Josh with Ottman detailing (google). He detailed mine after I bought it/before I applied clear bra and did a fantastic job. He won't do anything to your car that it doesn't need, very fair guy. That said he is usually very busy so you will have to work around his schedule.
Seriously though I have plenty of supplies you would need to do this. I can also put you in contact with a guy who sells Adams detailing supplies in the Dallas area. Spend $100 bucks with him and you will have plenty of supplies to do this type of thing yourself a number of times.