A) power source? Electric motors so I'm assuming a mix of solar and wind? Or diesel? I'm guessing not nuclear.
B) docking. Can something this large (width more than length) actually be docked? From the shape I'm guessing "mostly no". So provisioning, embarking and so on is done via ferry? In open water? That might be fun. So actually visiting various places (getting off) might be very constrained.
C) dry-docking. I'm going to assume it can only be dry docked in the place it was built. That's fine for planned maintainence, but perhaps a problem if she became unseaworthy far from home.
D) is this a holiday cruise ship? Is it supposed to be permanent residence? If holiday seems like a poor alternative to an actual cruise ship (no / Minimal port docking?). If a permanent residence then it also seems like a poor choice. Limited access to everything (no overnight amazon delivery for you), very limited job opportunities, not sure what it's "exporting" to pay for the fuel. So I'm guessing not self-sustaining, so basically reliant on land for food/fuel? And cash. So permanent if you start mega-rich and don't need money. But if you're mega-rich why go on this thing? Why not just get your own yacht?
Sooo many questions... But ultimately I wonder;
A) who wants this thing? B) can they afford it?