Helping hands

Apparently, our neighbor (the man) works in construction (houses and the like). He is willing to help us out. We just recently decided to figure out how to lay the pipe for the bathroom (I'm "expanding" the current bathroom off of the main room so it is a proper bathroom). Carpet has been removed. Wood has been cut. No pipe though. We did manage to break the roof vent for the existing drainage pipe (to the apartment upstairs) while prying away the "walls" (if you could call them that) of the old "bathroom". Something we'll have to fix.