The OpenWrt One/AP-24.XY, a WiFi 6 and Ethernet router powered by a MediaTek MT7981B processor, is now available for $89. It ships with OpenWrt installed and features high-speed LAN and WAN ports.
I have 1Gig Fiber connection. I have Eth0 as WAN. Eth1 is LAN connected to a Asus XG-U2008 unmanaged switch where all the other wired devices are connected to. ( I do not have that many devices, 9 wired, 7 wifi)
My Asus RT-AC86U is now just a AC WiFi AP. (running Merlin Firmware)