I can't put a number on it, but not too many DTV certified gyms in Chiang Mai, applying in Canada before winging your way over very quick, communicative, uncomplicated, and easy. You can always change gyms after your first course.
All Thai embassies and consulates worldwide now use a single URL thaievisa.go.th to apply for a visa. Depending on your particular location your application will be directed to the embassy with jurisdiction over your location.
by midnight. But if you need time you can apply for/buy any other extension (that will be denied because you're not eligible) and get 7 day extension denied stamp to leave the country. You must leave with that stamp. The 7 days starts from the day that you apply/get rejected, so time it well.
Anonymous participant generally you have nothing to worry about. There are no real checks unless you are getting an in-country extension which is not advised better to do a border bounce and the passport control officers certainly wouldn't know the nuance of one account over another, if they ever in the rare circumstance decided to ask to see your funds
As long as the money is immediately accessible, Canadian consulates are pretty communicative, you could email the consulate you want to use and inquire