The main problem as I see it, is the lack of any sort of infrastructure TO build any single type of structure that would be considered a suitable form of ‘seastead’, other than adapting oil-rig designs, or cruise ships.
The only way I can build my concept is to build that infrastructure, then build the first of a series of similar structures.
With all the talk of inhabiting the seas, there is nobody willing to put forth venture capitol to invest in the infrastructure.
Build a digital design, then a scale model and you get the ooohs and aaahs, but they want the model of the mechanism to automate it, too.
Now, before you can get backing, you’re out, say $50K, to build a prototype model of a device, just to prove the construction technique works, then you build a 2nd scale model prototype, using that scale machinery, to prove it works, for another $10K.
Then everything has to be patented, copyrighted and trademarked, before the venture capitol ever begins, at which point it becomes corporate property and somebody in finance says we have t cut the budget, so guess what hits the chopping-block?
Suppose the first one of any design costs $500K, then the infrastructure was another $500K. It won’t matter that the 2nd one cost half as much and the 4th cost 20% of the first, what matters is the initial $1M to build a system and a thing that have never existed, but without the initial, say $75K-$100K, to simply build working models, nothing gets done.