Thanks for the response, @h0ckeysk8er!
Actually I found this post by @JDRoberts A Guide to Wireless Range & Repeaters - #11 by JDRoberts, which offers a lot of great ideas and insights. But since it’s a bit old, I wondered if there might be new gadgets available or updates to the hub.
Also, my current setup is fairly basic, with around 4 switches and a couple of motion sensors, but I’m thinking ahead as I might be adding more devices.