again, if we are talking about the US, not really. And whether you apply in or out of the country, you still must deal with financial requirements. The advantage of the non imm o-a is that funds can remain in your home country.
not really. I have gotten five non imm o-a multi entry visas over the past six years and will be getting another one in the next couple of months. I am in the US and use the LA Thai Consulate via mail. They are pleasant, knowledgeable and fairly quick. Plus when I come to Thailand on my non imm o-a I do not need to deal with immigration except for the 24 hour and 90 day reporting requirements.
If you are not coming to Thailand until November, you may really want to consider obtaining the non imm o-a multi entry visa prior to leaving your home country.
Korat immigration will prevent one from completing the 90 day reporting requirement until the notification is completed, which can result in a fine which usually ends up being paid by the foreigner.
You many want to read the recent moderator post on the confusion in asking a question concerning a “retirement visa” and then generate more specifics so advice can be provided.