Now it is possible to make “ribs” , by hand cutting with a jigsaw ... Just takes a little longer ... No reason for “lightening holes” , they didn’t save that much weight , but are handy for hooking things up like lights, cargo nets, and running wiring through to keep things neet ... which you can add later if you need it anyway .
Mike , Just an idea , why not build the empty space and actually live in it a few days ( you’re adventurous ! ) , really testing the ideas of what you need , and don’t ... I found all those RV’s were just an attempt to replicate a small home ... according to some “decorator’s idea “... who had probably spent little time ever camping in their designs . That or it was merely a copy of trailers made 75 years ago . ( according to what some old decorator thought )
You’ve got a little time huh ? Might be Fun actually working it out ( testing) what you want , rather than be influenced by previous efforts or what others want ...
Apologies , I can’t seem to think past the idea of camping ( or extended camping) in an
adaptable space... we got to camp out in our “RV" trailer for a few days hurricane evec , and although it was so “cute” with the little curtains , and tables, bunks , appliances etc. But in practicality , it was hideously Uncomfortable ... The seating hurt my butt if we sat on it for more than a few minutes ( like say , while eating) , The beds were comparable to my Navy “rack” , and too short for my large frame . The kitchen looked like a home kitchen but all that space and there was only a third of the cabinet available for storage , and that was so poorly designed , it became an eyesore the more we looked at it ... and it was pretty useless as a kitchen for anything other than eggs and toast ... ( see pic)
So many things I wanted to change ...
Be great to work it all out in the backyard , then on the road you’d be much more relaxed having everything functioning as you lke it, with exactly everything you need ...
Sorta’ build the inside as you go ... You’re going to build a fairly good size trailer for all you want , start making it a home and you‘ll need a dually to tow it .... just sayin’ ... It’s all the little stuff that adds the weight ... ten little things make a BIg thing ... I have much experience at making overweight vehicles ...

And then there’s somethings you can’t get around not having , place to sleep , cooler(food) , potty ... Beds don’t really need to be elevated , cause' if you use all the storage underneath it you’d already be overweight ...unless Carefully planned for , but then there’s still the framing weight ( even with foam ) ... little things ...
As you know the FoamStream is really still wide open except for the mini-galley in the back drivers side , I’ve been tempted to build it up inside sorta like this ( * see drawing below) but hesitate until we actually get to live in it a few days ... My main goal is always to make the wife comfortable , because her idea of “camping” is going shopping in another state...

