This leaves the tenants extremely frustrated, especially if it's a refrigerator issue causing their food to spoil, or possibly an issue with an appliance leaking water onto the floor, etc. 

What about leaking roofs or accidents you can't predict?

Remote control and locable thermostates,  water leak detetors and main cut offs.   

This year I've had two water leaks, one of them is ongoing.

He also suggested I bring out someone else to camera the system again to get a second neutral opinion.I hired Cable, Pipe, & Leak Detection and the technician that came out today was very impressed with the on-site system. 

Do that an at some point you will end up buying a vacant lot that used to have a gas station on it, that still has the old buried leaking tanks and the oil change guys just dumped all their oil changes behind the shop, and you will now be responsible for EPA cleanup to the tune of 100Ks. 

This morning she said the kitchen faucet is leaking at the base. 

There’s no indication that the leak is coming from the roof so it’s got to be from the walls or the ground but I’m at a loss on how to diagnose the cause and fix the problem.

For future years, we probably wouldn't meet the 500 hours test (though we still do participate a significant amount as we periodically re-stock supplies at the place, handle most maintenance issues due to shortage of workers in the town, and monitor sensors during guest stays - leak sensors/heat/stove).Specific Questions on Depreciation:Assuming that I have the qualifications for non-passive activity, I then have some questions on bonus depreciation and related stuff.5) It is my understanding that Qualified Improvement Property (QIP) bonus depreciation is probably not useful for me because I did most of the renovations prior to placing the property in-service (save for a few things).

It appraised at $553k and the inspection showed lots of minor to moderate deferred maintenance, mainly needing a roof and some foundation repairs and a few water leaks inside that need addressed.