Is there a benefit over just putting it in a boat/coastal building and using water (perhaps pumped from some depth) for cooling?
There's also plenty of coastline away from major cities. Find enough open space and it becomes feasibly multi-tenant. Add wind/solar and run a cable (or 3).
https://www.wired.com/2012/01/google-finland/ there should be a video with the details here.
I'll give you the constant temperature but this project is about using the nearly-free ocean to maintain temperature so surely the delta isn't too large here.
I don't see how this is easier than a boat at anchor.