Here is the problem , the Suvarnabhumi international airport is 30 kilometers east of downtown Bangkok, there is a airport rail link , ( an elevated train service ) from the airport to the Phaya Thai station ( downtown) but I don't arrive until 11:35 pm and buy the time I get thru immigration and customs it will be after midnight. The Rail link runs from 6:00 am till midnight, so I'll miss it and I won't be able to change any money till the next morning because all places will be closed at midnight also . So as I see it now I have 2 options, I can sit in the airport alone until I can change some money the next morning for many hours with jet lag OR you can meet me in the airport with some money to get to a hotel until the next morning and then travel after sleeping a few hours .