I think your beds are very nice. They look like they are going to last for a long time. I haven't found anyone around my area that gives pallets away. Thank you for the help.
I found a number of businesses that put out free pallets. Saves them money from paying to have them hauled off to the landfill and disposal fees on top of that. Anyways, the build is not specific to pallet wood per se. You could use salvaged wood, or new wood, to make the same design.
Over the years, I have tried a few different raised bed designs, and this pallet wood raised bed v 2.0 is my latest build with benefits of a stronger build and easier to put together. I don't expect free pallet wood will last forever, but the design makes it very easy to maintain and replace any boards that might rot out. Or, considering it costs me less than $2.00 for the screws and nails, I will just build a new one if/when the old raised bed needs to be replaced.
I have seen smaller, less sturdy, raised bed kits at the big box stores for over $100. I'm sure they are perfect for some people, but I enjoy building my own raised beds for $2.00.
Plus, I have to show Dear Wife that I'm still useful for something...
I have an old white freezer out in the garage that does not work. Dear Wife got a bigger, better, freezer to replace it. If I can't get the old freezer fixed, I have thought about converting it into a sub-irrigated raised bed for out in the backyard garden. But, I would certainly build a pallet wood wooden facade around the white freezer so it would blend in with all my other raised beds. Not that the plants would care, but I don't see Dear Wife approving of her old white freezer sitting out in the backyard without a facelift.

