I've got a couple sets of the Harbor Freight version of the "Go Jacks". They work very well for moving a car around on a smooth garage floor. A person can do it pretty effortlessly by themselves! But it sounds like you need to climb up an inclined apron to your garage. These roll movers are not cheap but are very effective for moving VERY heavy rolls or spools (or heavy vehicles on wheels) They are available in electric and pneumatic versions. I used these in my years of paper making (large heavy paper rolls) perhaps you could search for a used one in your area for cheaper. Just thought I would share another potential solution to your problem since it hadn't been mentioned. Car/roll mover

another linky to pusher