My water usage bill is the same.

For our clients, we separate repairs into catergories: 1) Health & Saftey - highest priority to avoid lawsuits2) Property Preservation - don't want a $500 water leak repair to become a $5k repair later3) Government Required - for city & S8 inspections4) Marketing Negative Impact - who wants to rent a "purple" house?

If you don't have water, sewer, and power at the property already, it will substantially limit how many units you could feasibility build even if 100% of the land was otherwise usable.

You have $606 after tax dollars to spend on the rest of life's expenses, including investing, buying flowers for your significant other, cell phone bill, water/electric/vehicle expense/food/childcare/hair cuts/vacation. 

If the landlord is paying any utilities that are based on usage such as water, then I might discuss a rent bump to compensate for the anticipated increase in usage and address that with the lease update adding the person as an occupant. 

Aesthetics won’t be an issue and it will pay dividends in the long run with eliminating landscaping/lawn and water costs.

If not, what happens when neighbor owner isn't maintaining their roof and water leaks are impacting your tenant?  

They put levels on the pad and check to see if there are any noticeable water entry points.

Will I need to pay for sewer, or is this included in the water bill? 

I recently have a water leak in a house.