Is this doable, or am I just nutty?

Okay, so last night as I was playing around with more ideas for my trailer (why is it that the more I find out, the further from actually getting started I wind up?) and I came up with something that would, if feasible, solve a lot of our family's travel issues. We have a family of 4. We love to camp. We love to bike. We love to kayak. We prefer to travel in our MINI Cooper convertible rather than our Pontiac G6. So the problem comes in to play that using the MINI keeps us from doing most of the other activities, as we don't have the space to take much gear once all of us are loaded up.
So my brilliant (although very possibly unattainable) idea is to build a transforming trailer. A lightweight frame with just enough steel to serve its purpose without overbuilding it. A lightweight, freestanding cabin that has mounting points and can be bolted to the frame for towing/camping, but then removed as needed. A removable mounting system for Yakima bars to attach our kayak and bike carriers and/or roof box.
Has anyone done something like this before? Is this doable? Any suggestions, ideas, concerns, etc. regarding designing the trailer, teardrop, and mounting system? You guys are the experts and I'd love to hear some of your wisdom.
So my brilliant (although very possibly unattainable) idea is to build a transforming trailer. A lightweight frame with just enough steel to serve its purpose without overbuilding it. A lightweight, freestanding cabin that has mounting points and can be bolted to the frame for towing/camping, but then removed as needed. A removable mounting system for Yakima bars to attach our kayak and bike carriers and/or roof box.
Has anyone done something like this before? Is this doable? Any suggestions, ideas, concerns, etc. regarding designing the trailer, teardrop, and mounting system? You guys are the experts and I'd love to hear some of your wisdom.
