Went to do a plastering quote last night on this mess how much would you charge?

Apparently the builder said he was ok too do the plasterbording, well....

Nothing is and I mean literally nothing is straight, Gaps everywhere. The skylights are a mess and none of the boarding is square and they all hanged below the ceiling.

Apparently he also tried bonding a over the door way again not flush with the wall what's so ever. Bonding at the bottom that's rough as hell. Corners that don't even meet for the beads.

I feel bad for the lady, but if I'm gonna plaster this I wanna ensure it's as good as I can get it. She doesn't want want me too rip it down and do it again as she wants the cost kept down and has had enough and wants it finished.

I work alone room is 5mx6m and is about 2.8m high at the low end. I've said 3 days too be sure. 1st day prepping/repairing everything ready too plaster, bonding and beading skirting ect. Check the boards are ok especially on the ceiling. I imagine with it being this bad some might be loose. 2nd day doing the ceiling/skylights (I'll be on stilts) 3rd day walls.

I was thinking around the 1k mark for this. I live in the south. What you recon?