I'm talking about females, not males. The same age concerns don't apply to males in Thai culture concerning sin sot amounts. It's only based on the female.
you mention what Thai men look for, but you don't list everything. Education isn't the only thing of concern. Age also is of great concern, especially if the girl is over 30 years old. They wonder what is wrong if she hasn't married yet, and the amount of sin sot is also based on age, not just education. A girl over 30 would be lucky to have sin sot negotiated at an amount over bt500,000. At 22-28 years old maybe bt2million as you mention, but not when they're over 30 years old. I've been to Thai weddings where the sin sot was bt20million, with 20 baht in gold, and I've been to weddings where bt300,000 was borrowed, and no gold just for appearances. In many cases age had a big factor in how much sin sot was negotiated.
Just having a master's is no qualification, unless you want to teach. Thailand is not a training ground for foreign workers. They hire experience, with lots of competition applying for what few jobs there are. What do you have to offer no one else has?
You can simply have your boss state on company letterhead that your job is authorized to work remotely, then signed. Thais don't really like being pointed out that they missed something.
so move to Mexico. Thailand wants anyone staying here long term to do it on their economic terms, not that poor people need the same option to live here, and still be poor. Thailand doesn't work that way. Thailand is a neutral country.