Wifi Mesh Network for large home property

We have a relatively large property with a main house (3500 ft^2), a small guest cottage (900 ft^2) about 300' from the main house, and a dock / entertainment area down down by the water about 250' from the house. We would like to be able to access wifi at all three locations. Right now we have our wifi with a range extender in the house which is horrible and doesn't work very well so we have dead spots all over the place. So looking into mesh options which seem to be the way to go. We are thinking about getting an Orbi system for the house, then running a cable to the dock area and a second cable to the cottage. But what would I put down at the dock and cottage. Can I use another Orbi there at each location? I can see how tghe Orbi's work within the house but not sure if I can wire them down to anotehr set of Orbi's at the second and third location or if I should be looking at a different product for the dock area and guest cottage.