Pretty much all the pinch points encountered were things visible and could have been through about at the start of the project. They've done this 9 times before, you need a wrench/pliers to put the hoses on. It needs to drain (also that drain cover likely needed a only a flathead screw driver to remove. Drilling it out leaved burrs and usually they are designed to be popped out with a little force.) They lived in 9 places and don't have a drill that can chuck in a small hole saw. Seems surprising. But I guess the point is you don't know what you don't know.