You need 4 pair and you also need to know where the other end of the connection is. If it goes straight outside to a telephone demark, it doesn’t do you a lot of good. If it goes to a patch panel somewhere else in the house then it can probably be repurposed.
She obviously was since it was $1000/hr.
Since WiFi 7 is coming, you aren’t going to find longevity. The best thing you could do for yourself is to separate the WiFi function from the router by using AP’s.
Unless you’re doing something very unusual (multiple ISP’s or a home lab), a home only needs one router – this is where you went wrong. You add WiFi with AP’s – not routers. A normal router should be able to handle as many networks/VLANs/DHCP scopes as necessary and will have a single default route out to the Internet.
You’ve made your network needlessly complicated. In order to fix things, you should setup all but one router in AP bridge mode. This does not completely fix things because wireless routers aren’t going to act as a single controller for your wireless devices. If you can return all of these routers, I’d recommend it because AP’s would provide a better solution. Do you even have a need for more than one network? Do you even have a managed switch? Does everything go back to a central switch?
You’ll get a much better result if you use a wired backhaul and then you don’t need any of those mesh systems. You could then use standard AP’s.