Simplify with openwrt: Routing and shaping an asymmetric "gigabit" connection (e.g. 1000/35 Xfinity) on a <$60 Router... for most people and without another computer running 24/7 : r/openwrt
Amazon.com: FriendlyElec Nanopi R4S Mini Router OpenWRT with Dual-Gbps Ethernet Ports 4GB LPDDR4 Based in RK3399 Soc for IOT NAS Smart Home Gateway (with MAC Chip) : Electronics
1200M Wireless Smart Router Dual Wan Openwrt USB multiple Print HDD NAS VPN | eBay
Amazon.com: 4g LTE+ Advanced OpenWRT Cat6 Unlocked Sim Router Modem with Carrier Aggregation Preconfigured for use on The T-Mobile Network and Compatible with AT&T : Electronics