Like John said, a good fluid head…and lots of practice.
Can’t say that you would be able to achieve a decent rock-solid ending using freeze-frame, as not only would you see a slight jarring effect when you freeze the shot, but you will also lose any movement that may be happening inside your frame.
If there isn’t going to be any movement within the frame, another idea might be to simply use a still photograph (wide shot) of your buildings and create your movement by using pan, tilt and zoom effects within Vegas itself. You can then control any movement by using key frames and smooth them out as you prefer. Won’t get much more rock-solid than that.
Cheers,
Bruce