I am going to offer some advice from a guy who has every pin on the 3rd floor of his house, so everything goes up and down two flights of stairs. I have taken 8 pins up and down in the past year, quite a bit of moving. I own one of these

http://www.lowes.com/pd_498412-929-79480_0__?productId=4765249&Ntt=hand+trucks&pl=1&currentURL=%3FNtt%3Dhand%2Btrucks&facetInfo=

It is well worth the $140 for a nice hand truck. It still takes 2 people, but the dual handle makes it east, just like doing a dead lift, get both feet two steps up from wheels, pull with both hands instead of one, have someone pushing from the bottom, I am almost 40 and not in the best of shape, my relative who helps is over 40, we can move a pin up the 30 steps in less than 5 minutes, that is with a hallway and a 180 degree turn.