Usually if you do the TR visa applications and not just border hopping then they wont have a problem.
As long as you spend money and go through the regular TR visa process each time then they dont usually care. Just dont be hopping back and forth and not bringing the TR board revenue.
Also they prefer to see flights to a different country and a flight back in vs doing Land Border Hops
Food, Femininity, Cost of Living, Weather, Culture, The Kindness of the People, The Beauty of the Country, The Variety of Vacation Locations (Mountains and Hills vs Beaches and Islands), The Quality of Healthcare for the Price.
gotcha! I think I should be fine. I have a green card as well so worst case, Vietnam and Cambodia are cheap enough to stay in for a while if I need to go to the embassy.