It's MUCH more costly.
Brute force always is. Isn't going to stop me from trying though. I halfway implemented a brute-force a few days ago before I realized that I'd overlooked a big mistake (it swapping the first two boulders, repeatly, until memory failure).

Besides. These are cavemen, remember?
Og move big rock here. Rock heavy. Og make Ug do work.
You try to move the boulder, but in vain.