Technically our wifi doesn't need fixing, it's just that while gaming the connection drops often enough to cause issues, regardless of speeds. It isn't really noticeable with phones/general internet use. The idea of this plan is to help alleviate the stress on the AP, by making the devices that can have a wired connection (computers, consoles), use a wired connection. And since both my brother and myself have experienced issues, we both want to go wired, and the opportunity to get it done properly has come up.
There isn't much to explain when it comes to the wifi. Currently my mother is connected both wired and wirelessly to the router. The plan is to make all desktops/some laptops wired, where the wireless connection is mainly used as a backup for redundancy. I can remove the lines for the wirlelss signals if it helps. I'm also revising the secondary network, possibly with mesh-like interconnection.
Also, thanks for your input.