[MikeDubreuil]

I think your best bet is to run the cable to your house. Deal with ampliflication issues later on. In fact, I would consider it the cable company's problem if there was any amplification problem.

Running electricity 1500 feet is no more fun than running the coax. I believe the wireless would be more expensive after you run the electricity there, and the waterproof box, and buy the wireless gear. You will also increase the latency of your internet connection by using wireless. There's also the problem of security, wireless isn't as secure as a land line.