Great battery life and linux unfortunately are a hard task and linux support is often spotty for consumer devices.

Sticking to used business hardware is usually a good start, but you should check for compability issues nonetheless.

Hmm the prices on eBay really don’t seem that good to me in comparison to newer generations. I guess the power consumption will eat up any savings pretty quickly. Though this might differ for whole sets.

Extra config options always result in more complexity, so I would strongly prefer to change the hardcoded pruning interval instead.

Why would that be the case?