I caught a 3 show series a few weeks back on the travel channel called "Extreme RV". Each show covered builders of vehicles of all sizes from pop-up campers to multi-million dollar coaches, with lots of material during builds and lots of good info to be gleaned. One stop was at showhauler for a build.
Two of the episodes are running tonight (early Friday a.m.) at 12:00 am and 1:00 a.m. and 3:00 a.m. on the travel channel. It is a current show, so I am sure they will re-run again soon. Check your listings and set your DVR. Worth the time is you only pick up one good idea.
I could not find the show specifically listed on the Travel Channel website, but if you to there and search "extreme rv" some of the clips are listed there to see on the website but not all of them:
Extreme Rv : Search : Travel Channel