We have a Park Model, it has slides, an RV plug in and holding tanks. There are also Park Models that have a peaked roof and require a separate electric install, direct connect to sewer, not sure about slides. We bought our Keystone Retreat because it is what we found close to us. It is parked next to our house for MIL to live in. Where we leave we can do this. I didn't want to go the separate utility route. We are happy with it. I would have liked to see more variety but down here they aren't easily found.