I haven't measured it with transit and surveying tools, but I remember the seller proclaiming that it was 26 1/2 long. I know that it'll hold a pair of bikes side by side -- twice, with another in single file in front of that - and a pit bike way up in the nose. Enclosed, yes, with built in cabinets, stereo, wired for both 12VDC and 110VAC, has fluorescent tubes in the ceiling for the 110VAC, ramp rear and angle-front ramp doors, curbside walk door. About 3,000# empty, I think -- although I've never weighed it without a load in it.
By all means - shop for snowmobile trailers on the new/used market. We bought this one off the side of the road around this time of year (end of snowmobile season). There are quite a few of this ilk out there.