Just a thought Josh, but have you thought about how you are going to transport them, how many you are going to transport, and what you are going to make the frames out of?
If you want them as strong and as lightweight as possible, you might want to think outside the box a little bit. Take a look at this idea.
http://www.fcsme.org/karlb/id4.htm
You may also want to view the S&S guys and waffle frames for bigger modules.
http://www.mindspring.com/~gugliotta/
The module frame in the FCSME article is now 8 years old, spending most of its time in a trailer, except for 4 shows a year and breif stints in my basement. Neither winter cold nor summer heat have had any ill effect on it, except for the scenery is getting a little tired from the trailer bouncing all over behind the truck. Little "Louanne" as we call her, also has 2 big sisters, 6 ft in length that are outweighed by some of the other club members pine 4 ft frames! They are incredibly light, strong, and not that hard to build. In fact, I'm building 3 more later this week! The layers are laminated together with Elmers wood glue (It's waterproof when dried) usually 48 hours before cutting. All cutting is done on a table saw (for precision) and the panels go together with more wood glue and small brads fired out of an electric stapler!
No matter whose standard you make them to, modules have this neat habit of getting heavier as you get older. This is the voice of experience here. If you are serious about setting up for Freemo shows, or with a local modular group, make it easy on yourself. You'll enjoy the show even more!
