A laymans opinion on the challenge: Waves lose energy, and the exact placement of antennas will matter. I don’t know what the mechanism is called, but we don’t place wind turbines right next to each other. That is afaik because each turbine takes some of the energy out of a larger chunk of the wind-wave in an ‘bubble’ around it, so we place them with optimal distance according to efficiency of that mechanism. If I’m right the effect will probably be minimal. Anyway, just a stab at an interesting thought…
There’s a cheap zbtlink openwrt wifi6 3000Mbps ‘z8101ax-d’ on AliE for around 50 $. (https://www.aliexpress.com/w/wholesale-zbtlink-openwrt.html?spm=a2g0o.productlist.search.0)
I don’t know how long, and haven’t tried the product, but maybe some here have tried it ?