Homemade Camper/Toy Hauler

I was just curious if anyone on here has made their own homemade camper/toy out of an enclosed trailer or anything similar. I would like to get a enclosed trailer that will hold 2 ATV’s and then at night instead of having to set up a tent and blow up air mattresses and all that fun stuff I want to have AC/Heat, and all the simple comforts of home. I think this will be about the only way my wife will be able to come with me and ride. The issue we have now is that if we want to go camp and ride we cant bring the dog, which is important to us as she is our fur ‘child’.

Just wondering if anyone has done anything like this? Im thinking that a 7×12 or 7×14 will work for our needs, and hopefully will allow us to travel a little more to ride, and to camp.