(I'm not sure what it's called but it will reimburse them for food if something goes wrong like a leak into a pantry or the power going out).

You'll know what to expect it to be on a monthly basis for someone living similar to your lifestyle, which will help you identify if there are ever leaks or someone is using the water excessively if you see a spike in the bill.

Roof leaks started a couple years ago.

The home had years worth of clutter, plus a very strong pet urine smell, but structurally (except for leaking skylight), my contractor found the home to be solid. 

Seller has addressed few items related to plumbing (leaks), roof (replacing some shingles) and I have reinspection scheduled for tomorrow.

If you get that handled then the total rehab you're looking at based on the picture shouldn't be too bad.Whether it is the roof leaking, pipes, foundation, etc you get that handled and it should go away.

I'm looking at it using an iPhone and am very impressed by the clarity of the picture.

Wash windows inside and out and repair / replace crumbling brick and mortar if necessary. there should never be indication of water staining or leaking pipes anywhere.

How to Rehab with tenants in placeGreetings everyone,I have a little problem id like to discuss  i bought a 2 story duplex in 2015 and i live in one half , the wax-ring from the toilet in my tenants unit was leaking, the water starting leaking in the kitchen below, im sure there is water damage between the floors and i like to get this fixed, whats the best route to take to fix something like this when you have tenants in place.

I use both the Kwikset and Schlage wireless keyless locks here in Texas with very good results and I can operate them via the iPhone apps.