Would you be able to sling a 100m Ethernet cable on poles (with due consideration for wet, etc?) If so I think you could either have a second, cascaded router at the second property, or a wi fi extender plugged in at the far end. I would carefully cost these options and wait for other suggestions. I assume the two properties are not on the same electricity circuit? If so homeplugs are possible.
Alienware 17 R4 2017 review