Does it have city water/sewer?

Is the roof updated, and are there modern electric wiring and new water pipes?

Now she complained the issue of toilet fill valve which caused unreasonable high water bill and claimed it belongs to wear and tear and a plumbing issue.

If not, I would go closer to water, but not on top of it.

I look at the BP video taking about the 50% rule and that is completely blown out of the water with newer construction

The other option is a water tank.   

Water and sewer will vary a little by usage in most jurisdictions.

There are plans to improve both water fronts.    

Electricity is functional in the property, but I have not gotten the water to work yet.5) Insurance PoliciesI was informed by a fellow tax deed investor to obtain builders risk or vacant property building insurance policy soon after the deed is recorded under my name?

Have your plumbers look underneath the tub for water, or mold.