Here's a kind of medium duty truck conversion that doesn't look too bad: http://www.westsidemotorcoach....alties_Motorhome.htm
They've had it listed for quite awhile too, so I bet they'd come down for an offer. That Balin coach looks like a great price for what it is. When I first looked at it he was asking more I think but I can't remember how much.
'03 Freightliner FL112, 295" wheel base, with '03 United Specialties 26' living quarters, single screw, Cat C12 430 h/p 1650 torque, Eaton 10speed , 3.42 rear axle ratio