Mostly just for fun, though VLAN management is a lot easier with this setup. I'm also hoping to play around with Deep Packet Inspection (HakcerFactor's No-NOC networking series got me excited about the possibilities there).
For hardware I just took a machine I had lying around (r5 3600 + 2x4GB DDR4-3200 + GTX 1070) & threw a cheap 4-port NIC in it. Costed me about $20 off of eBay. Access Point is a Linksys E8450 (bought it last year as it was the first WiFi 6 router with OpenWRT support)