Add insulation... to you, and the wife, in the form of blankets, covers, layered clothing, etc, or add insulation to the motor home to minimize heat losses. That is the most cost effective way to add heat... by retaining it. You only need a thin layer of warm air surrounding all body parts. By heating the least amount of air around the body parts, you maintain the highest levels of efficiency. Bundle up, and your wallet will stay warm with the extra paper insulation inside of it.
As a kid, some super cheap parents of friends of mine used to dump us down at the mall all day on hot summer days. That was a way of saving their electrical bill from the ravages of keeping the AC blasting and sucking megawatts monthly. Alternatively, go hang out at McDonalds, drink Sr. Citizen priced coffee, charge up and suck wifi on their dime during the coldest portions of the day, from 4 am to 9 am down in the "Q". You can learn a lot by observing all the Rasta bums with corn rows or dread locks on how to get by on less, they know all the tricks. However, being a Gypsy, and stealing, is where I draw the line.
