Not everyone needs fancy or complicated networks. If you want easy just go mesh with wired backhaul. The advantages are simple setup and having extra Ethernet ports at each node. The nodes also act like a switch so each one would give you the ability to connect more devices at that location. Yes OP could get really fancy but that doesn’t appear to be what they are after.

Trash work, though it will probably work fine. I would request they send someone out to do it right. When they refused I would just do it myself.