If you let a car sit long enough, the rubber tires will develop a dimple. If you let it sit decades the tires will completely collapse. Now you are dragging a multi-ton steel sled with rubber nonskid pads instead of free rolling tires. Also, this is an underground garage. Not a ton of room to move around.

> isn’t it cheaper to call a friend

Its not moving a couple of boxes of furniture. I'd never seriously ask any friend to do this on a lark. Just pay the insured "expert" their fee so you don't have to assume any liabilities.