you can build one but PoE might not be in the cards unless you want to convert the injected power back to a 5v barrel.
Alix makes a decent router board that can host Linux and dual PCI cards means 5 and 2.4 ghz AP's. the total would be ~200 for each "AP" but they would be pretty massively powerful.
Alix makes a decent router board that can host Linux and dual PCI cards means 5 and 2.4 ghz AP's. the total would be ~200 for each "AP" but they would be pretty massively powerful.
https://www.pcengines.ch/alix.htm