I am impressed that I thought of this. At $26 each, it is a relatively cheap plan for building the raised beds. I have been working this out in my head since the beginning. I have considered retaining wall stones, wood, old tires and finally settled on 24"H galvanized window wells. These should be easy to install and durable. I bought 2 to check the fit and to see if I like them, and I am quite happy. Now I need 7 more and quick. Planting time is upon us!