IQ Lab (
www.iqlab.co.th) will develop the film, no problem. In fact, just about any lab in Bangkok will I think, but IQ is a professional lab as opposed to most labs that cater more to the consumer market.
Is there any reason though you are set on shooting on medium format? Instead I would rent a hi-end 35mm digital SLR. I think no need for MF. And digital backs normally have to be tethered to a computer to get the right results which I find to be an added burden to the work flow.
Khun Rachot at Pro Center Ltd. on Soi Suan Plue (Soi 9 - Opposite the Thai Immigration department off of Sathorn Road) rents out lots of equipment including hi-end digital cameras and should be able to help. Tel. 02-679-3077