$200k does seem a bit high. Have you seen the Hawk Engineering site? He's got a very nice garage coach for sale there. $135k I think.
'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