you guys have given me a ton of things to ponder. very helpful. A couple comments. It is 475 lbs shipped. I'll have a 30 yr old man to help with the task, whichever way we go. We had a 26 ft box truck make it up the driveway to the top no issue when we moved in, but whenever I've had big deliveries in the past to prior home they seem to come in a 35 ft truck, so i gotta be realistic about that tactic.
at this point i'm leaning toward a) just paying a guy with the equipment (skidsteer, forklift etc) to do it, or b) renting trailer with ramp, having truck drop it on trailer, towing up the driveway and walking it off the ramped trailer with my friend. If this approach feels unrealistic, i'll remove pump/motor and walk it off that way. Figure 300 lbs for the tank, with 2 guys that should be doable.
btw, that fancy handtruck PugetDude mentioned in post 56.....that is intriguing. Wouldn't surprise me if Sunbelt rentals has those....