The data buoy would help with mariculture, in multiple ways, however, if it is part OF a seasteàd, the weather monitoring can use standard, available equipment. UNDER water data, however, would be helpful, as a scientific info source, as a potential fishing guide network and as a management tool, for mariculture.
SINCE the goal of Seasteading IS to live at sea, gathering data would be beneficial.
W.E. and his shadow have fantasies that the engineering technology, and materials technology cannot build.
Finance your own smaller projects, however you can. My own is coming out of my own pocket, and will cost over $150k, be hand built, but the materials and engineering, even the basic design, already exist.
Don't let pissants ruin your party. Just sayin'