dam, my 570 weighed in at 850 pounds. I did it with suction cups and 4 to 5 guys but it was straight forward out and into the house. We only lifted the total weight for very short periods of time. I also took car towing straps and them looped around peoples shoulders on all four corners. A extra protection if the suction cup failed and it helped in lifting. I also slid the tank over a Mattress, through my window and on top of my stand.
Going down stairs, you will need allot of guys with suction cups and straps. You have to decide whats the best plan. Lift and carry down stairs, or you can place it on a mattress or something and slide down stairs. Im not going into great detail, you get the idea.
Also, don't count your self in moving it. Get enough man power with out your self lifting. Someone needs to be in charge and be looking at the overall situation. You should help but, be in charge and be ready to tell people what to do and where to move when needed. Its going to be crazy I can tell you that much.