What type of visa can my wife apply for while I obtain my non-B visa in Vientiane?

I did the same last month in Vientiane, you need to make an appointment first (hopefully at the same time with your wife) . Ask your employer to provide you all docs for your wife as well. She will be applying for non O visa. Also if your marriage is not registered in Thailand you will need the original certificate legalized by the embassy of your country and a translation to English and Thai.

With all docs you shouldn't have any problems. The cost for non o and non b for single entry 90 days is 2000 baht. Good luck

Next available non O visa appointments are Friday 17th and Wednesday 22nd May

Next available appointment is 17th May, next week is not going to work.

Your wife would apply for a 90 day single entry Non-O visa based on marriage to a foreigner who legally works here on a Non-B and she can apply at the same time you apply for your Non-B visa

Did you already make an appointment for your visit ?