I’m pretty sure that’s what the grab for Ukraine and Trump’s stated intent to annex Greenland is about. Both of those have the potential to become food security sources after significant global heating. I’m also pretty sure that’s why authoritarians are seizing control of govt (and by extension that govts security services) because there won’t be enough to go around and they’re going to need soldiers to keep the hungry people away from their billionaire breadbaskets.

Old thin clients and mini PCs are great for this. Many either have a half sized PCIe slot or can take a second network interface using the WiFi m.2 slot and a 3d printed bracket to mount the nic port.

You’re best off splitting the routing and WiFi tasks into separate hardware. Buy yourself a used ruckus unleashed r550/650 or r510/610 depending on how much you want to spend for wifi then run routing on whatever hardware is fit for purpose. I usually slap OPNsense on something like a dell/wyse 5070 j5005 mini PC, any mini PC with a PCIe slot will allow you to build a 1/2.5/10GbE router with open software. Chinese N100 router boxes are cheap now too, or you could reuse an old mini PC of some kind.

I don’t like rolling my own router using arm boards anymore, router distro support for them is unreliable and j5005 pulls <10W anyway.

Not understanding the difference between pre and post 9/11 politics