Thanks everyone! I do live in the Mojave. The swamp coolers are our friends. My new home has a old noisy one and I am used to the water/humidity it ads. Helps with the cooling when I open all the windows. I know that the cooler is mainly forced air in, windows open to let air out. Thanks for the over fill warning while driving, I was wondering about that. I too want to set it at the back of the coach. The water and power sources are nearby and a reroute would be easier. I was wondering about noise issues when comparing shore power A/C versus the swampcooler. I do intend to use it while driving. The cat has gotten a bit used to that. My Toy is a lot quieter than the old class C we ditched a while back.
For the sake of it I will check motor mounts, although the previous owners complained to a repair place, and was told little could be done to alleviate the noise issues with it. The cat loves the A/C on shore power. Guys, who have both, how do they compare? The 12VDC usage isnt that much, and I will eventually go solar too. but that's a few years down the road.
once again, thanks for your replies and assistance