I just remembered this optical link from the guys who wrote the 'links' browser: http://ronja.twibright.com/ . It's called rojna. Looks like it might be expensive hardware though. One of the users says he's got a 1400 m link working at 10 mbps. I think there is a certain amount of home assembly required. Anyway, just mentioning it for interest. I think they're in the czech republic. Probably overkill for this application though!
It's increasingly looking to me like the simplest solution is the standalone 4G router, if you have coverage, and if it's available in your country. The caravan won't be on the same home network but they will have internet access which is probably all that is needed. If they need access to the home network you can always open an ssh port for them.
I guess if all else fails, there always starlink! You'll make Elon happy
. Hey, it works in ukraine!
It's increasingly looking to me like the simplest solution is the standalone 4G router, if you have coverage, and if it's available in your country. The caravan won't be on the same home network but they will have internet access which is probably all that is needed. If they need access to the home network you can always open an ssh port for them.
I guess if all else fails, there always starlink! You'll make Elon happy