your reply is senseless. I am living in Thailand off money I earned 20 years ago but have no way of proving it is not my monthly income. Think about it.
This might have been said before but I can't read all the comments!
Get 90 day non o retirement in your home country. That will make it easier to open a bank account and put the required funds into it before you apply for 12 month extension at your local immigration office.