Art, mirrors, and gallery walls hung level and on the right anchor for the weight.

There is no single number, because these four things change it. Tell us about them and you get one fixed price before we start.
In Nashville: Plaster over wood lath is common in older homes around Nashville, and it cracks if you drill it like drywall. It needs a slower bit and the right anchor. Tell us the house is older and we will come prepared.
Real jobs, photographed as we left them. No stock photography.
Tell us the job and your town. You get a fixed price before anyone shows up.
Prefer to talk? (629) 468-8960