For my side, my setup is not nomad, I need to get 230V (Europe voltage) from the house and I set up in a field 30m far away from the home wifi router. My solution is to set a Wifi hotspot from the astro PC which I connect if I'm close. And I use CPL plugs, one next to mount/pc and the other one on the house plug and plugged to a mini router (set in repeator mode on the home wifi), which sends its own wifi with WWW access. So I can access the session from both hotspot and have acces WWW anywhere. The only down side is I need to change the wifi network if I switch from being close to the mount and getting away in the house, but that's not a big deal.
I should setup forward ports between both hotspots but I never dug deeply. If anyone has knowledge about that, I'd be glad.

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