@Simon ******
well, an METV only has a 6-month validity. If it gets issued on January 2, it expires on July 2. He can't use it for anymore entries after July 2. If he applies for another METV by July and tries to enter on it in July, he will be refused entry . . . . tourist visa and visa-exempt entries are not meant for a longstay in Thailand, , , and it doesn't matter if you hold a valid tourist visa or not - eventually after 180 days inside Thailand within a 365-days period, most Immigration officers do not consider you being a "real" tourist any more if you try another touristic entry. What he intends to do, he will not succeed with. If he really stays outside of Thailand for 5 months, his chances are better, and would actually be BEST if he stays outside of Thailand for 6 full months