A floating city in the Maldives begins to take shape
https://edition.cnn.com/style/article/maldives-floating-city-spc-intl/index.html
Though the article says electricity is supplied by solar power, it would be impossible to supply electricity during midnight. I guess estimation is so ambiguous that there will be many problems.
To supply water, there should be desalination system. Is it possible to install the system?
There are some doubts.