I have a floating fortress mod. it's a reasonable sized exterior with probably 100 + statics. It currently floats (hangs static, no havok) in the air somewhere near White run just on the crossing of 4 different cells (just to make it easier for me).

My original idea was to make it float from city to city (say Falkreath--> Markath-->Winterhold; but whatever).

I had already abandoned that idea (it's very nice for immersion and flashiness but doesn't add much functionally really) but one of the ones whom tried it had the same idea and asked me if it could be done.

I have totally NO clue how I could do this. Any suggestions?

It would almost certainly have to be done via scripting. I definitely think this would add some awesomeness to you castle however i am in the processes of learning the basics so I am probably less able than you.

I would do it like this, Have your city in multiple places, but have all but one dissabled, and as the day goes by , enable different city's , Best way todo this would be to reference every object as a child of an xmarker, then enable/dissable the xmarker

Hmm sounds a bit to much for me since I don't know much about children of markers and how that would keep them in a correct place