The tools might work. But then you discover the plumber from 20 years ago did something crazy. Or the wiring makes a left turn in the space between 1st and 2nd floor for some reason. Thee dimmer switch that was $15 and should have taken 10 min to install actually does not have enough clearance behind it because a drain pipe is there, and so you need a special smaller size electrical box or you need to cut holes in the wall. Etc, etc.