Have you considered renting an appliance handtruck? Some of them have stair glides that are supposed to help move up and down stairs.
I don't have a Harvey but I would bet that motor is pretty easy to remove too. That should help reduced the weight further.
Wow! I just looked at the Harvey website and they have their bandsaws seriously discounted right now. The Ambassador is reduced from $2750 to $1500 with similar discounts on their other bandsaws If I didn't already have a 17" Grizzly, I would clicking the checkout button right now.
--Nathan, TX. Hire the lazy man. He may not do as much work but that's because he will find a better way.