I had my NM135 (375lbs) moved to the 2nd floor up stairs. I had a guy who specializes in moving vending machines do it. He had a dolly (the kind used for moving refrigerators and whatnot), except his dolly was adapted for stairs, and was electric (battery plus motor strapped to it). The motor does all the lifting, but the operator still needs enough muscle to be able to tilt the hundreds of pounds back and forth on every stair. Small asian women need not apply. The guy does this for a living, and only broke a mild sweat, but I helped, and I found it "harrowing".
Anyhoo, with the 375lbs of NM135, I could see the floor of my very old building visibly sag a little as the weight was rolled over.
For an NM200 (1500lbs??) you need to be worried about going through the stairs/floorboards. I'd consider completely dismantling it (alot of folks do this anyway, to ensure it's all nicely lubed/tightened/trammed/free of casting sand/etc) and moving the pieces one by one.
Personally, I'd consider just insulating the garage and declaring victory.