If you had to route PVC piping outside of a house and your exterior was all brick (facade) with wood sheathing as the backing, would you go through the trouble of finding a masonry hole saw and cutting the nice hole, or would you just use masonry drill bits to drill a line of holes and then just chisel the piece out? I may have to run a 1.5" PVC pipe outside.
I've had luck drilling a bunch of holes and cleaning up the hole with a hammer. Then caulking around the pipe to cover up any ragged edges. Sure you could buy a holesaw but I'd rather buy a tool I'll use more than once. My 2 cents.
I would get a drycore bit. Drilling a bunch of holes right next to each other is a nightmare. It keeps on wanting to go back into the other hole.You could probably even rent a drycore bit and chuck it in your own hammerdrill if you have one and have it done in less than a minute.