Not sure that you can. I translated it from the original, linked pdf documents using Google Translator - for convenience, as not everyone here reads Thai. 😉
No idea. The visa can be revoked, as it is stated in the law, if you breach its regulations. Also, at every entry or at every extension, immigration officers will always be at liberty to re-check all requirements. But that is theory for now.
Might work. Might not (for long). I am worried that with the rules as they seem now, the new DTV will be "abused" and the rules will be adjusted and tightened up, later.
I am German. I have to pay my taxes wherever I choose to become a tax resident (by living there 180 days a year +). Gives me more flexibility than that US world income thing which Thailand seems to aim at. Then there is mutual treaties regarding taxes between countries. It is a very complex topoc - espcially when not knowing the details to come, yet.
I don't know. I would assume they would have to rely on your truthfull tax declaration. How do the US do it - they tax global income, too? Maybe if you want to avoid taxes in your home country, you would need to give them your Thai tax id and then your home country lets Thailand know.
Sure thing. From what I understand now, you just need to show proof of it when applying for the DTV. And from what I understand, it does NOT need to be in a Thai account, but can be in an account anywhere.
You'll be fine in cities - certainly in BKK. I just feel sad for places like islands (Phangan, Koh Tao and such), they are already vastly overrun as it is - with all its negative side effects. I live in Chiang Mai - here it is that everyone wants to live in the "Nimman" or Old Town area, where rental prices have exploded. But if you just venture to some neighboring areas, all is good.
Yes. To an extend I believe that to become the case. But concentrated on the usual regions and areas. Most people just flock around the already overpriced, overtouristic places.