I am getting water leaking under the shower stall and it has recently started leaking water into the 2nd level living room. I had a handyman in today and he doesn't think it is a plumbing issue. The tiling along all 3 sides has grout cracks, 1 tile is loose and the wall is soft on 1 side and noticable bulge on one of the walls.

I know I have to strip and replace all the tile, probably replace the dry wall and repaint and patch up the leak in the 2nd level from the small water damage.

My two questions are is there something else I may be missing and is this project a bit too ambitious? And has anyone else had to do a job like this that can share experiences or advice with me?

Thanks!