Think about this, you are all set up at your campsite for the week. On day 3 you run out of milk, or any other supply. Now you have to disconnect your electric and stow the cord, put away the lawn chairs and any other items you may have out on your site, disconnect and put away the sewer hose and if your wife is like mine, put away several breakables inside so you can drive the house to the store. That is what you get with a motorhome. With the TT, you jump in the truck and make a quick trip to the store.
And these fancy newer trucks have cameras and extras that make backing easier.