There was a small water leak under a toilet in a rental property I own.

This isn't all hypothetical, in 2018 rates hit a 7 year high water mark, a non-trivial bump in the overall 40 year pattern.

Mine has roof, floors, hvac, hot water heater, appliances, bath and kitchen remodel.

Put in a new support wall outside, new roof, fixed walk around porch, new HVAC system, 2 new bathrooms done in the historic style in one and not in the other, new water line,  new floors, fixed wall that was fallen 6 inches from second story to foundation, replaced termite damaged foundation beams, paint and cosmetic stuff, all new plumbing, lots more.

The land needs water service, electricity...

Did any water intrusion happen in those 15 years that might have compromised something like an electrical panel?  

The water has been disconnected for about 15 years.

Hi, We recently had water backup come up from our floor drains in the basement.

Check exterior grade, you don't want water problemsHope that helps....

Someday we’d want to add tankless water heater and Quiet Cool.It’s a highly competitive area, with low supply and had the highest growth in rent increases.