I assume you have a Non o multiple entry visa married to a Thai, so every 3 months you have to leave and re entertry Savannahket it's a great little city and great restaurants along the river, and also many good affordable motels with good amenities
I actually do work with my wife at her mkt stall and have had no problems, to be exact some of my local immigration officers actually do buy off us at time's and I've served them , the last time was Thursday just passed and actually all the venders and stall holder's actually get along fine with me being there, and I am the only foreigner in the whole mkt go figure , to get in trouble for helping your own legal wife id say would be a million too one shot.
Jesus you were here during covid and asking how to stay longer, Don't you think it's time to go to another place for a while your choice , but you will be denied sooner more than later.