If you're not planning to leave and then come back to "continue" the education visa it doesn't really matter. As long as you leave before the last stamped date on your passport is ok. I did it like this and I was only 6 months with the ed visa (in a 9 months course) and just left, that cancelled my ed visa automatically, and then I came back as a tourist again.
can be wrong, because there's 2 different powers related to the DTV, one is foreign affairs and the other is immigration, so there's a conflict there. FA can say one thing, Immigration can say another. If Immigration says you need 90 days report, then that's what it is, no matter what Foreign Affairs can say about it.
Bro, some agents have told me that I can only have 60 days visa exemption even though I tell them I have a Chilean passport (we and 3 more countries have 90 days visa exemption).
They don't know too much about many things visa/immigration related.
that is not allowed since the DTV prohibits you to work with Thai clients in Thailand or for Thai companies. You will have to prove that you have clients outside Thailand, maybe have a portfolio and a website offering your services as an online personal trainer, I'm thinking something like that could work.