I have a METV (expiring Apr 6) and will arrive in Thailand (Phuket) with a oneway ticket Jan 6. I will bring a return ticket Phuket-Singapore March 4-7, so I don't get into any trouble with my oneway ticket. But I don't have any other tickets out of Thailand. Could this be a bother with the airline when I'm leaving Singapore, or with Thai Immigration when arriving?