the OP has explained in the comments he's english and moving from Pattaya. When I go to Isan there is additional fee to withdraw from Pattaya account, plus complications to get bank letter to renew annual visa
all the rules are the same to live throughout thailand so all you need is transport, then register your TM30 at the nearest immigration and possibly move bank account to that province
Hopefully you have visited several times as many areas are so different you need to tour for a couple of months and understand culture etc before you consider a move. Above post good advise regarding visa requirements
talking local bars not tourist places, friend used to stay a winter and drink with the fishermen, he spoke some of the language and always was charged more than the locals