You're starting to amass quite the library. What to do? One suggestion is making the hardware available for checkout (when you're not using it of course).
Start by finding a public-ish space, like a makerspace or a library. You’ll also need a system to enable checking out software. You can decide whether folks are allowed to borrow it and bring it home, or whether it will just be for checkout within the space. There's some great open source library software where you can create an inventory and keep track of who has checked out which board and what date they need to return it.