It's definitely heavier and more difficult to maneuver than a 9800. The 9900 really needs 4 separate hand holds (which is really too far apart for less than 4 people when moving). Once you have the base setup, it only really takes two people lifting and one person positioning the printer on the stand.
Also note that depending on where you get it, the odds are it'll come freight on a crate with pallet that needs either a forklift or package mover (a hand operated forklift).
You should definitely require a delivery truck with a lift gate...the first printer I got from Epson was an Epson 10000 that was delivered by semi-truck with no lift gate...3 big guys (and a small woman) was able to wrangle the printer out of the semi but just barely...we really, almost dropped it!!!
Please, don't underestimate the project. More people is better...hopefully your dealer can help explain some of the difficulties...
Oh, and getting this up on the second floors is gonna be a chore–I seriously hope that the stairwell isn't too small for the printer to make the corners.
Not trying to freak you out, just trying to warn you.
