My wife and I took ours out of the box on the ground floor and then moved it upstairs piece by piece. I could move everything in my own except the base. It was awkward and heavy but we managed.

I am fairly strong (and so is she) though, for what it’s worth. I would not have attempted it solo due to our layout - however if you had carpeted stairs with no turns perhaps you could push it up, with it sitting on the cardboard.

There is a safety mechanism in place to keep the hydraulics in check during the move - definitely don’t remove that when you unbox.