If he has no knowledge yet of what he may do, have him get his retirement visa (OA) in England it is a bit of a hassel to get but the basic's are ; 50yrs old, pensions of at least 65000 baht per month this way he is covered for the first year or two here if he plan's the renewal out right. I came on vacation 5 years ago and have been living living here since. Here like everywhere else has its downsides but the upsides outway those by many.