Hey, I have no experience with the accessibility side of this, so I cannot tell. At least now. If I’d explore the topic, I might recommend something at some later point.

I have a MacBook Air 11” from 2010, with a broken screen. I plan to utilise it as a server, but it’s not really good in that department. I do that purely because of the experiment, plus I have it lying around anyway, so why not. If you want, I can link a blog post about the laptop, when I’d write it. (May not be very soon, say, weeks. If no months. No ETA. I played with it for a while and put it off for later.)

The time capsule, is it a router? I have an AirPort Extreme router at home, I still use it. It’s a decent router, if you don’t need anything too special. I have no idea how good that is accessibility wise. I believe Apple products are the best at it, so I’d rather recommend macOS, I have no idea how bad that is with Linux. I remember the relatively recent series of posts about it, I bet you know them better.