What are reasonable bathroom remodeling costs?

[Bradley​ Lobo]

Hi there,

My wife and I recently bought a house in the King of Prussia area in Pennsylvania. I'm not familiar with bathroom remodel estimates and am trying to get a better sense of how much we should be anticipating spending. We want to replace two walk-in showers that currently have glass doors. 1 shower is 3.5ft by 4.5ft wide by 7.5ft tall. The second shower is 3.0ft by 4.5ft wide by 7.5ft tall. We had one remodeler come out to give us an estimate to redo the two showers. 

They said they would: 

1)take out the old tiles around the shower walls, 

2)replace the floor shower tiles which are currently uneven and result in water pooling in the corners, 

3) and replace the damp drywall behind the tiles on the walls, waterproofing it, and treating any mold before reinstalling high quality acrylic tile boards instead of tiling

We would like them to also add an exhaust to the bathroom that will vent out to the roof but they said they can't do that since they are not licensed in that area. Currently there is no exhaust, so no pre-existing vents to the roof. Also, the house has a flat roof and no attic. Not sure if not having an attic makes it more complex.

They said they offer a lifetime warrantee backed by their company and supported by Good Housekeeping. The quote for two showers was $36k all in (labor and materials), which seems like a lot for two showers (not full bathroom remodels), but I'm not familiar with remodeling costs in general. They said the first bathroom shower space dimensions aren't standard so they require creating a more customized base as well as customized wall acrlyic boards. There definitely is moisture behind the walls. The remodeler pulled out his moisture meter which read 64% on the walls around the shower. The prior owners of the house that had done the bathrooms did the grouting poorly and didn't use the right caulking so it's causing a lot of the tiles to get a little loose. How much can I expect to pay on average per shower (labor and materials combined) in general? Is this price a reasonable price. It's the first quote I've gotten, so it's hard to make out if it's reasonable or not. And how long does a project like this typically take. The remodeler described above mentioned it's a 5-7 day job. This seems fast. 

Appreciate any advice or insight. Thanks

Brad