Anonymous participant the point is these border run vans and buses are dangerous, catch on fire, and/or are driven by maniacal yaba smoking drivers.
Fly in and out like most normal visa holders, penny pinching will end badly.
Poipet is a fine border if you know what you’re doing, I often drove out there from BKK when I was doing monthly visa runs (yes I was penny pinching and nearly died several times over).