@Mark ****
but this guy posted he was using SAVANNAKHET for a year-long, multi-entry Non-O not vientiane for a 90 day single entry :/
You need to remember different consulates require different things and what savannakhet requires for a year-long, multi-entry Non-O has NOTHING to do with what vientiane requires for a 90 day single entry :(
BUT
in this case you're gonna be fine all you can get in Vientiane is a 90 day single entry and the documentation is the same AND there is no proof of funds