Have a look at Leisure Travel Vans - Canadian made and well insulated for cold weather use. We have a model with a murphy bed so half of the 24 ft. length is not devoted to a bed which is only used at night. We have a huge bathroom and residential style shower. We had a Lance truck camper for 7 years and a Class A for 5 years. We find this unit is a cross between the two. Works really well for us.
Oh, and the murphy bed is a residential queen mattress - not some 2 inch foam pad.