I have a natural gas generator on my house for the last 7 years. Best investment for the house I have made. You can put one on the house for a reasonable price. I have a briggs and Straton 6K generator. It has a maximum of 12 emergency power circuits. It does not power the whole house but it is enough to cover the furnance, fish tanks, refridgerator, living area and sump pump. I purchased the generator online for $2000, found a local electrician to install it for $600 and paid my neighbor who is a plumber $50 to do the gas line. I leveled the ground and positioned the generator. All the quotes I got for someone to do everything was alot mor expensive so piecing it out may be a more effective way of purchasing it.