I haven't seen them be mentioned, another good option is to buy a thin client or multiple thin clients.
You can get them on eBay for <$100, they will typically have a fair amount of RAM and a quad-core AMD CPU (enough to outperform a raspberry pi pretty easily), and they will typically be on the order of <20W of power usage, meaning that even running 4-5 of them with k8s/Docker-Swarm won't murder your power bill.
You can get them on eBay for <$100, they will typically have a fair amount of RAM and a quad-core AMD CPU (enough to outperform a raspberry pi pretty easily), and they will typically be on the order of <20W of power usage, meaning that even running 4-5 of them with k8s/Docker-Swarm won't murder your power bill.
Just an example: https://www.ebay.com/itm/154783701325?hash=item2409d3d94d:g:...
You can pretty easily install Ubuntu or something on there and treat it like a normal computer.