[Note to moderator: If this discussion is more appropriate elsewhere feel free to move it.]
I am sure SPIN farming has been discussed on these forums many a time. My topic does not directly relate to SPIN but an outgrowth demand that SPIN could cause. If one was to meld SPIN and many of the Polyface farm concepts you end up with a nearly portable farm infrastructure concept. But there is something missing -- portable housing infrastructure. Even the Polyface folks use static housing structures. Specifically small scale barns and greenhouses. Now someone might ask 'why'? My simplest answer is money. Many don't have the resources to buy land but would have the opportunity to lease it to get started. But it is quite an investment to raise housing only to have to leave it behind when one does find property to own. If it too was portable you take it with you.
Now my leanings are a concept pioneered by Ken Issacs way back in the Domebook days, Living Structures. His early efforts led to Gridbeam. Later he looked at using metal tubing and purpose built crossbeam trijoints for much larger structures. So one uses the metal tube grid as an exoskeleton for rigidity. Then couple that with lightweight panels of some sort in a repeatable assemblies that integrate with the exoskeleton. Possibly one panel overlapping another like scales if the structure is to be larger than the span of a standard panel. The whole affair can be expanded, contracted, rearranged, assembled, disassembled as needs and opportunities demand.