Relax
@J**
, first things first and visit them again, monday or tuesday. If it does not work out, Savannakhet is always an option. I went all by myself with public transport, but you can look into flights to Mukdahan or Savannakhet directly. You know if you love your wife you leave her home, but she has to sign a few documents This is the list
Non Immigrant O based on marriage Savannakhet or Vientiane.
Copy of:
front&back of the original marriage certificate
front&back of your thai wife's i/d card
thai wife's house book listing
data page of your passport
lao visa and entry stamp
2 passport sized photos
a filled out application form
Show the original wedding certificate
you sign everything with your name on it, your wife signs everything with her name on it meaning you both sign the marriage certificate
Those things and 2000 Thb get you a 90 day single entry Non-O visa based on marriage.
Or 5.000 Thb and you get the 1 year Multiple Entry Non Immigrant O visa based on marriage only at Savannakhet.
Edit 15 Jan 2020, out of a report:
If the wife did a name change:
Tabien Baan name change edit on the back page from maiden to your surname OR
The certificate that shows an official family name change