You have options that are not always offered in estimates. Not always an expensive demo and new installation
I can give it more life by repairing broken tiles Regrouting ( scraping top layer and adding new grout) then removing old caulking and recaulk with quality material which makes it water tight and looks like new installation
But much less money and hassle of demolition work. In and out 1 day
Not 4 long messy days