I have been doing a ton of inspections for resi generators. The problems I see is that a home owner can buy the generator for the same price If not less than the EC can. Now the twist. If the EC buys it, will he provide service for the generator? Maybe if he buys from a larger company. However if the homeowner buys it, most times there is no service guarantee at all. So if I was buying it, I would go to a reputable company and look for the one that offers service to your machine down the road.