need to also figure out a long term plan for these beds, they will not last forever. I am thinking about wrapping them with sheet metal and steel posts. Then when the beds fall apart they will just stay inside of the metal enclosure>

I was going to ask exactly this. Since the beds are made of wood, they have some disadvantages. When you water the plants, there will be leakage because they are made of wood. This means that the plants do not benefit from the water enough.