yes thats what i am planning just waiting to hear from my bosses work schdule. I do repars so no regular rotations so even more difficult, as least you probably know your dates
I am same as you (offshore angola at moment) easiest way is savanakhet, problem is now with online appointment thing you have to really plan ahead as supposedly booked up for two months in advance.
not an issue with extensions, i been red flagged and pulled over at airport before and never an issue with extensions. Its actually different immigration departments the in country ones and border control
Join Thai citizenship group for more information, but you need to have been working here legally and paying taxes to get PR first. Unless you are married even then its a long process.