When I put my safe in, I used the winch on my old Jeep CJ. Still have the winch, but not that Jeep and the Willys is still in pieces. Otherwise, I'd offer to help. Seriously, two sheets of plywood for the yard, some 2x6 for the steps, a rental dolly (get the one with the stair sliders on the back) and some kind of winch or come-along to do the lifting.
Next time, I'd add a blanket too. Got a small nick on my safe. Hardly noticeable, but I know its there. Only took two of us to move a 700+ lb safe this way. The hardest part was getting it out of the pickup. If you've seen my pickup, you'd know why.