let me give you my situation a bit so you can see what pettiness you will be dealing with. I applied when the program was first introduced and was denied because my employer UPS requires me to travel about 7-9 days a month through SE Asia. Your suppose to work only from Thailand. So a year later I applied again with an emphasis on my work here in Bangkok for UPS. I was denied this time due to my employer having a presence here when it's suppose to be a foreign company.
I guess what I'm saying is they will be looking very very hard for a petty reason to deny you. They love to brag about how many applications they have had submitted, but never reveal how many were approved. Do yourself a favor and don't waste your time on what I can best describe as just "pettiness"
The LTR work from Thailand visa has many many requirements that they don't list and arbitrarily enforce in an "o-so-Thai" kind of way. If you have plenty of time to waste then apply for it. Hope you have better success and experience than I did.
I'm a pilot that flies in Asia one week per month rest of the time is here in Thailand. I do fly into BKK airport as well but that wasn't good enough for them and got denied