paul, i think showers are more expensive to buy/install since you have more material to purchase - tiles, backerboard, laying tiles, underlayment, etc.also, cleaning the corners of a shower is harder than rinsing the tub after you wipe it down. but the tubs get chips and cracks in the porcelain.

Is it ceramic or porcelain?

They may have done it on wood seats or the porcelain back part in the past and would not have had issues.

porcelain tile flooring, smoke and carbon monoxide detectors wired into the ceiling electrical system, the most sturdy screens, if built before 1976 you will have lead based paint issues, make things simple, plan to pay for trash pickup and provide containers with attached lids, can you provide outdoor clothes line (when people live on small budget they hand wash and hang dry which is hard on plumbing shower fixture and moisture)  where is it located?

If your foundation is concrete slab go with porcelain tile is not very expensive and if you chose the right style it has a upscale character to it, if your foundation is wooden go with a direct installation like vinyl tiles or sheet or engineer wood,

I know its a waterproof floor, however, ceramic or porcelain tile is more durable for a bathroom remodel and will last longer. 

I'm stuck between doing a waterproof vinyl throughout the living areas and a porcelain tile in the bathrooms or just do the Vinyl throughout.My main idea for the tile was to not give it such a uniform look but curious on other peoples thoughts and why, thank you fir your time!

For flooring I am currently using all porcelain tile in kitchens and baths.

If I wanted to go all out, I'd probably buy a marble look laminate top for the vanity with no backsplash (from ikea) and get a couple of the square porcelain drop in sinks from MR direct and then put up a tiny tile backsplash under the mirror and replace the cabinet knobs with chrome to match the other hardware.

She burned the toilet- the porcelain part.