If you lease from Solar City, be aware that if you need to sell the house, you may have a hard time finding somebody to agree to take over your lease monthly payment, unless it's a prepaid lease.
The 30% Federal tax credit ends in 2016, 2 years away. There's no telling if they're going to extend it out further or not. So if you want to go solar, don't wait too long.
I don't think solar panels are going to be so cheap in 3 to 5 years that you can do your whole roof for $10K. Without the 30% federal tax credit today, solar is not affordable/justifiable to most people.
Solar installation is not just about electrical work where you can simply seek advice from your master electrician neighbor and that's all she wrote. It's dangerous back breaking work carrying heavy panels on the roof and doing dangerous walks on the roof all day long to do installation. Some local government requires professional installation as well.