What is a reasonable projected cost to set up a solar whole house system? Selling it back to the utility does not need to be factored in unless its not reasonable to do so? Let's use a new ranch 2300 sqft house with a well, forced air furnace, a/c , 60 gallon hot water, and 4 occupants? The system goal would be enough solar to not need the utility co.pany at all. Detroit Michigan location.