I said a couple Thai falang is 400k and a western couple I didn't know but the OP has a Lao wife so non Thai and are delbt with separately therefore 800k each.
U can't even work out a multi entry visa 😂 and U laugh at others.
I've been in Thailand 17 years , I don't claim to know about visas at all but I know how my visa works.
I'm on a retirement visa and new rules say , when U take Ur bank book to do Ur visa or visa renewal , the 800k HAS to be visible in ur bank 2-3 prior and 2-3 after , any other time it doesnt need to be there but i did hear it cant go below 400k so u need to check on that.
This stops the agents depositing the cash for u then 5 mins later returning it.. cos they are trying to by pass it.
Thailand don't want the poor in and they see 800k a year as acceptable.