I don't think I'd look in either place, too many two week millionaires, expats and sexpats around that set a profound precedent of being a walking ATM.
I think I'd start by spending time in Chiang Mai, Korat, or maybe even Udon Thani if you wanted to date a girl out of the trade. These places still have plenty of city infrastructure and farang oriented restaurants/businesses without having to live in the boondocks/sticks to date a country bumpkin.
Can always relocate later, but I think I'd start my search in a less well-traveled place than Hua Hin / Pattaya.