I recently explored around a stalled project along the Chiang Rai road on the hot springs area. It was intended to be in the Khmer or Cambodian style and even though abandoned for a long time, still has strong foundations to continue on. Notwithstanding the anomalous style in Lanna cultural country, it seemed a shame that it didn't get finished and if finished well could definitely be a very good project.
I have no advice to offer and I'm only making an outsider's comment, but if this was to be your project AND if you were able to enlist the help of an honest lawyer, and if the project was allowed, I would say good luck and go for it! Looked like a very good concept from a casual observation. It's certainly in a very good position 😊
i was in exactly the same position last year and opted to pay the fine at the airport because it would save the hassle of a day at immigration to get the extension.
I'm back in Thailand now but if I had that time again I'd probably get the damned extension. Every time I go near an immigration officer now I get the warning about overstaying. Nothing too dramatic, but it does have an effect on the proceedings later on. It just makes you a suspect to overstay again and it is a dark mark on your passport if you're a regular visitor.