The poet philosopher Kahlil Gibran, wrote in his poem on marriage, "But let there be spaces in your togetherness"....and most marrieds need some space. The disasters that followed any numbers of our friends who purchased RVs, boats and even homes, stemmed from one of them yielding to the impulse that consumed their spouse.
I had a friend who became almost like a survivalist and insisted that his dear wife assist while they canned more veggies and fruits than they could ever manage to consume. He'd proudly boast about their "60 jars of tomatoes that we canned last weekend" and we'd wonder to ourselves ("is that what they do for fun?"). Well, it turns out that the wife's grin wasn't real.
We're not fulltimers, but our swipe at maintaining harmony is that all of our motorhoming is planned together, including the MH purchase itself, just as most of our life together is planned together. My motto is "happy wife, happy life" and it does work marvels if people shape their dreams together. I learned alot about canning by watching my friend's marriage cave in because of it.