I've had 'savings' accounts with SCB (purple), Krungthai (light blue), and Kasikorn (K-Bank, dark green). I also have credit cards from TTB, Krungsri, and K-Bank. Best experience so far has been with K-Bank. Good app, easy to pay by scanning, easy transfer, not much need to visit a branch in-person.
The problem is that CELTA and Trinity TESOL are virtually unknown to many schools in Thailand. The schools, recruiters, and agents only know "TEFL" and bachelor's degree. Plus, from what I've heard CELTA techniques are more geared towards adult learning. Better for aspiring teachers to get a bachelor's in Education and get licensed or qualified in their home county first. Then do a TEFL, if needed.
Top International schools recruit from overseas. Bi-lingual schools, private schools, and government schools (or god forbid, agents for those) require you to be here, but the pay is much lower. I've been in Thailand for eight years, and only the first studio apartment we stayed in for 1 year didn't have a kitchen or a washing machine inside. Most condo rentals do. But of course it depends on where you're going to live. Big city or rural? Ovens are a much more uncommon thing. Upscale condos and houses might have them, but that's all.
We spent weeks assembling documentation for my wife's applications and they didn't even look at any of it. The last time she got denied the agent said she believed everything about her request and yet still denied it. At this point my wife is tired of trying.