I would feel bad for you guys, but the wiring portion of my project, which starts in about 2 weeks, is going to be performed on a 100 year old existing house. I am going to be working in the attic with a full on face mask, because it is full of that gnarly gray blow in insulation, or in the crawl space which is nothing like crawl spaces on new houses. I get about 8" of clearance for my jug ass to shimmy underneath the floor girders.

I already finished the sanitary drains though, and honestly I cannot see it being any worse than that. That was a freakin' chore. Added 2 bathrooms where there was no bathrooms in the upstairs without removing the ceiling below.