I noticed packet loss on a laptop's internal wifi card even with a professional grade wifi access point nearby. Looking through the advanced settings, I noticed a few settings for "power saving" modes. When these were disabled, the packet loss disappeared.
In my experience, a charged laptop (plus cell phone backup with tethering and regularly tested) might be a good backup for a properly wired trading system with everything set to "high performance".
This is an opportunity for you to quantify what would happen in the event of a failure of any component in your system (not just wifi), and then work on mitigating those risks. Network connectivity is just one area.