That statement says it all "learn to live with what you got because you can not improve either." People that have never lived off grid don't realize what they are giving up when they unplug from the grid. You are forced to move with the seasons in most cases if you want to remain as comfortable as you were when you had AC and heating 24/7 provided by the grid. If you can afford, have the carrying capacity and space for the latest tech batteries, thousands of watts of solar and a generator in case you get one too many cloudy days then you have a shot at living a nomadic life with few compromises. Odds improve dramatically if you follow the seasons. It seems to me a van would have to be well insulated, completely covered with solar cells, carry a generator, have several batteries and a mini split or extremely low wattage ac to stay cool in 100 degree outside temps and maintain interior temps in the 70's not to mention heating in below freezing, humid cloudy months like in the northwest. It is much easier in something like an already well insulated motor home or RV as you have more roof space and usually more carrying capacity. Living a nomadic lifestyle off grid is all about compromises they can be made easier but in my opinion at this time it is not possible to live in a van without making compromises. We need to stop "sugar coating" AC and heating with solar when it comes to living in a van. You ain't gonna set the thermostat to 72 degrees and forget it like you did in your sticks and bricks in your van for less than you power bill was.