Solutions may or may not work for client long term, everything is marked way above market price. For instance, you could sell a client an AC system, radiant barrier, and blown-in insulation on top of solar, and claim these will reduce their electricity bill by 40%, which may or may not end up being true. Customer has no guarantee of these savings. There is tons of turnover as sales reps realize that what they are selling may or may not work and is priced far more than the competition.