3Furniture sliders make the whole thing free
A felt or plastic slider under each leg turns a two-person, floor-scratching sofa move into a one-person push, which is the entire reason rearranging without buying anything is realistic in an afternoon instead of a weekend. The lifting guidance agrees with the physics: the NIOSH lifting equation tops out at 51 pounds for one person under ideal conditions, well under most sofas, and workplace safety guides put it plainly, it is easier and safer to push than to pull. Size up the piece before you shove it, and get a second person for anything that has to leave the floor.