Ideally for your router you want something that runs an open source firmware (OpenWRT, DD-WRT, OPNSense, FreshTomato). Its better because you get a completely unlocked everything you need system with security patches for the hardware's true lifetime. Every router company stops with the security updates after a few years and then at some point it becomes part of a bot net or one of this mass hack events. Its best not to play in that game and instead run some open source firmware from the outset.
The best way to start is to look at the website for openwrt.org and use their filtering to find a device that supports your needs (at least 5 LAN ethernet ports I guess and some wifi but AC sounds like it will do). The other option is a more typical 4 LAN port router which will give you a lot more options and then add a switch to that, doesn't sound like you care too much about it being managed or >1gbps so they are also dirt cheap.