You are very dedicated to carry buckets up and down stairs my friend. I would imagine the ability to suck water up a flight of stairs is more contingent on how much water pressure you have (?)
Why not email the python people and ask them directly?
pythonproducts.com/contact.html
Maybe they would allow you to try it, and if it didn't work you could return it? I think if it works, it would be worth every single penny you pay for it. I honestly think the "python-type" product is the best piece of equipment I have - it has made my water changes a 5 minute task.