I agree with
@La***
, (y) given your work requirements, I'd say once you're married to go the thai consulate in Savannakhet Lao and get a year-long, multi-entry Non-Immigrant Type O visa based on marriage. That visa is good for unlimited entries into thailand for the validity of the visa itself (a year from the date it's issued) and each entry you're stamped in for 90 days.