Best High-Efficiency Air Conditioners in Las Vegas NV

I have a yearly service contract with YES and they check my AC,heater, plumbing,....once a year----it is worth it. I would like to suggest that for loyal customers they include a list of one-time (once a year) basic plumbing home repair like replacing a toilet flapper, tub diverter, .....free of charge for labor if parts are supplied by home owner, or at least a large courtesy discount of 50%. I am sure seniors and singles would greatly appreciate this type of incentive/loyalty offer.