Two bathrooms to redo, wow! Someone else just posted a couple days ago about the same thing! And in both cases, it is hard to figure out how much skill /knowledge / time you have. It's a big project. Hundreds of hours for the most experienced professional, and an order of magnitude more for a DIY.
Are you in a condo building? Who is "leading you to believe" various things?
Post a drawing of the floor plan.