While i was back in Thailand for 2.5 weeks, after the airport construction contract came to an end, we met with, interviewed and checked out ,and ultimately rejected all but 1 of 7 builder possibilities. Hugely differing levels of interest, of course wild variations in the prices (!), with one confidently stating that it could not be done for less than 20M - I think he had been out in the sun too long (rejected of course)
It came down to 2 - one had a lot of temple building experience which i thought might be a good option for the roof requirements, both were experienced in creating the wood look using mortar (we saw samples of both their work and it was excellent), the second one was cheaper and available and had his own piling equipment, so we did not need the external piling contractor + plus that meant he was 100% responsible for 100% of the build. he was also based nearer to the project site.
so... builder no.2...come on down.. the price is right! (oh...and you some work to do)