I got the impression they were building less than a dozen custom campers per year.
I think that this is highly unlikely. Just think for a moment:
-they have 5 or 6 base models;
-4 of the models are sub-modeled to fit half ton and smaller trucks;
-they have a line of ultra small models for sub-half ton trucks;
-they are also building hard side campers (from time to time).
I would say that they build a minimum of 40~50 units a year (in a bad year), but most likely 55 to 60 units a year, not 12. Outfitter may also be building in several facilities (ie. hard-side and pop-ups in separate facilities). I think that they don't build campers "on spec" anymore. They build only for firm orders (all this IMHO)...