Wireless is for convenience and for low network requirement applications. Its much cheaper to deploy than using wire. For his internet bandwidth using AC wireless will work fine as long as he connects his routers using ethernet or wire and not wifi.If you CAN run cat 5 and avoid a WiFi link to an immobile desktop, by all means do so.
Or MoCA, or IP on powerline.
Wireless is the "last resort".
Welcome To SNBForums
SNBForums is a community for anyone who wants to learn about or discuss the latest in wireless routers, network storage and the ins and outs of building and maintaining a small network.
If you'd like to post a question, simply register and have at it!
While you're at it, please check out SmallNetBuilder for product reviews and our famous Router Charts, Ranker and plenty more!