It's better to get a solar system when you own a home. Don't overextend! If you have a mortgage and you need to finance your solar energy system, you could endanger your financial security.
If you will be ground mounting your solar panels, consider the wildlife in your area. Panels can be quickly destroyed by curious raccoons, hungry deer or hibernating squirrels. Try to place your panels in an area that is not easily accessible to such animals to optimize the lifespan of those panels.