Thats a lot of work but Rain? Better give estimates or written ballparks. Most of that kind of work is not covered by insurance. Unless it's a sump pump malfunction , it's all out of the homeowners pocket.
I can't tell you how many times I've been told "It's got to be done" but once I started to talk about price they folded fast.
If they can't afford any money up front, they probably won't have it in the end.
DON'T DO FREE WORK...Unless you want to.