This would be fine except for the fact that the cable signal won't make it 500 meters. That' if your planning on splitting off of neighbor's house. Even at 500 meters with mainline coax an amplifier or Line Extender is going to be needed. Those alone will cost more than the cable at about 2 grand each. If fiber is used, you probably won't need a repeater, but your gonna need a node at the end and that's an easy 5 grand too. The $10,000 might be a lot of money, and might be inflated a bit, but it's not that far off. I'd recommend using a cell phone connection if available. Should be able to get 1-3 meg via USB cable if there is service there. And unlimited access shouldn't cost much per month.