You're limiting yourself a lot by expecting Debian preinstalled. If you're going to deploy homebridge / ha on it, you really should be able to install the whole

You're limiting yourself a lot by expecting Debian preinstalled. If you're going to deploy homebridge / ha on it, you really should be able to install the whole system yourself. I don't expect you'll find anything preinstalled really and I wouldn't trust them without wiping anyway. For the hardware itself, check for office mini PCs on eBay. Optiplex or thinkcentre are common ones that get sold cheap after 4-5 years. NUCs are fun, but usually more expensive.