again I spoke with a immigration officer because I live in South Boston I haven't looked at the e visa online. I will scroll through the e visa online when I get a chance I just mentioned what had been told to me awhile back and considering how fast things change in Thai immigration rules I'm not doubting what you have said.
I contacted my local Thai embassy "Boston" and was told I could pay for multi entry on a non-o or non-oa visa the latter requires a bit more like health insurance.
this is very limited as a scheme to bring in foreign funds. What I do understand is that the government changes rules and laws as often as doing laundry. With such a big investment and never really knowing how stable the rule of law is its mostly a gamble unfortunately. It becomes a personal choice of how much possible loss one is willing to accept.
even in business you would be a minority owner 49% which still wouldn't allow a foreign to own land. The most is a 30 year lease for land as you could buy the building or home but your visa could be revoked without notice and then be put on the black list and banned from entering for 5 years so buying is very questionable.