We went and looked at them. My guess in American dollars around 14000 dollars...ish.
You can get one of those portable tenty thingies that open up and just put it up over the kitchen. Takes like 20 seconds. No brakes on the tag so no need for a controller. It’s a nice upgrade from a tent as your sleeping and cooking requirements are all looked after and always available. No bathroom. But a porta potty is an option. With its weight and small shape and foot print I bet you wouldn’t lose more than 30 percent of range.