Jagmandave,
Even small systems are quite expensive but $50k sounds like a big system.
In the UK I ran a company that designed, supplied and installed renewable energy systems. Last one we were involved with before I sold up a few years back was 9kw peak (which is a big system), part solar, mostly wind, and ran to about $30k US.
Small dc turbines such as the Swift Turbine, with a generating peak of around 1.5 kw watts can be purchased for around $2800. For larger, grid connected systems of 220 volt and around 6kw, installed costs at that time in the UK were from about $20,000.
Prices have come down since then and with a larger market in the USA, systems should be cheaper than in the UK.