When you live in rural Isaan and have some land, it is very easy to use bricks to make your own garden beds.
Arrange the bricks in the shape and size you want.
Install the heavy black landscaping paper in the bottom.
Add a sprinkler system is you have a well or water supply.
Fill with good dirt.
Add your vegetable plants.
This will provide a mainentence free garden and will yield very healthy vegetables.