You're thinking along the right lines. Your service provider should be able to tell the problems. As long as they are using it within the weight limit the elevator shouls be able to handle it. Most obvious problems will be with the cosmetics, construction workers usualy aren't careful. Construction dust will be a big battle and yes there may be some premature wearing out of parts from the added use of elevator. My experiance has been almost all problems have been from the abuse from contractors on the doors and buttons, and a majority of the calls caused by construction dust.