@Rai *********
As a retired Immigration counsel, especially the fact that the Entry you are seeking is at the start of the calendar year, I can fairly say, without any prejudice the messenger/poster, this post focused on a negative outcome is unwarranted as the Immigration Officers have been instructed to look for those that ABUSE the Visa Free Entries with Extensions to stay longer than the allowed 2 entries 60 days + 2 extensions ( = Longer than 180 days IN the Country), and thankfully, the travel history shared falls way outside those parameters, so with all your other requirements such as 20k Bahts in hand, Air BnB booking as well as Return Flight covered, and the fact 83 days falls way short of the allowable length of stay, there is absolutely no reason to worry about a refusal. ✌