Widdow pensions are an old benifit, you hardly can trust for the future. They can easily dissappear when the politics get new ideas. In my home country they have done so, since decades. πΈπͺ
It's changing much under the time and how much money you are sending. It's more important to do it the right time, when your own currency is on top against the Baht. A type of luck every time you succeed π