If memory serves, TP-Link makes a directional wifi setup. They claim some kind of stupid long distance, miles and miles, so maybe it's a simple turn-key setup that would make easy work of getting your cabin connected. No experience with it, though. I don't even know if they still make it.
At some point in the last year or two I think Linus Tech Tips did a review on Ubiquity equipment which gave amazingly long range. Several hundred meters if I recall correctly. I have zero experience with Ubiquity equipment, though.
Brad