When removing cabinets alone, it is helpful to stack sawhorses as a support while you remove the mounting hardware. I have two horses, a saw pony (what else would you call a 1/2 sized sawhorse?) and scrap 2 x 4s arranged so the cabinet drops about 1/4″ when the last screw comes out. I know it looks risky, but it is actually very stable.
Empty cabinets are usually not heavy, just cumbersome, and almost impossible to hold steady with one hand.
