Backstory, I had to remove a a small section of drywall in restroom because wall adjacent to bathtub was wet.

Tenant agrees to pay for clearing the drains of any and all stoppages except those, which the plumber who is called to clear the stoppage will attest to in writing, were caused by defective plumbing, tree roots, or a result of weather.Tenant agrees to keep on hand and properly use a plunger when necessary to unclog drains and to prevent water overflow from toilet, sinks and bathtub.

On the plumbing repair, unless you see a common problem, like most of the bathtub drains leaked.

Looking at buying a duplex in my area, going to see it in person this weekend, but from the photos I can see that one of the bathtubs is quite rust stained.

The bathroom sink and bathtub are severely stained, with the bathtub having a 2 foot wide black discoloring that rises about 3 feet up onto the connected wall.

What is your opinion on concrete bath tubs, they are a trend and expensive, but not for the crafty DIY type.Can't recall the magazine right now, but there are sites as well that give the average space allocated to rooms in a range of total square footage of a home, like 12% for a kitchen in a 2000 sq ft home.

The standard bill they send is based off of how many bathtubs are in the unit and whatnot and don't factor in efficiency or use, so I'm hoping it'll decrease once I get the meter and have my bill adjusted.

It seems like an expensive thing to do fully unless you are building ground up because to do it fully ADA compliant clearance at showers, bathtubs and toilets can require moving walls.

My question is: would it hurt the value of my property if I got rid of the bathtub/shower for a standalone shower? 

I FAR over paid for "renovations" which included new electrical, a paint job and a ghetto bathtub refinishing job which lasted about 6 months.