Also, remember to bleed water lines (for all garden hoses) so they don't freeze up on the first day of freezing temperature! 

Normally this happens "automatically" when they are mounted in the window, but it's a good thing to check every couple of years, so they don't start dripping inside the house.If the unit ends up dripping somewhere you don't want it to, some units have a place you can connect a drain pipe/hose and move the drip over a few feet.

I know of many lenders who do not record the funds they lend and have gotten hosed in the past.

I start with the best braided stainless supply hoses.  

Dehumidifier install--I'll bet they really like that.So even if they are a put off by the timing they will be more comfortable.If it were mine and and only 1 rental, or only 1 or 2, the "Rental Experience" I want to offer in this instance would be to try to find a convenient time that works for both.No need to play Drill Sargent and make them feel their privacy has been violated in a SFH as long as the option to be flexible is there.But, if you have no other option, then you have no other option.I'd let them scurry to clean the place for the visit (dust, pick up old crushed beer cans, empty ash trays (and hide them), wash the dishes, make the beds, move secret pets somewhere, etc....Turns are expensive, why step  on a Hornets nest if you have another option.An apartment complex is different, those run on a schedule, home or not, dryer vents get cleaned, washer hoses replaced, filters replaced, leaks fixed, etc...Just my 2 cents.

I received a similar letter from a city and it related to 2 of the garden hose valves leaking pretty good. 

A couple that come to mind are the house where we had to spray the wall with lysol and use a scraper to get the smoke and nicotine that was oozing off the wall or the place where dolomite was spread everywhere to control the fleas, or the place where the renter cut a hole in the floor and put the drain hose from the washer into the hole to drain under the house or the one with the rotted hole in the kitchen floor that you had to step around to avoid going through the floor, or the one where it took a full day just to scoop the dog poop from the floors and use kilz to cover the dog pee, let alone the back yard, and on and on it goes.

If the hydrant is outside the Facility fence, then there needs to be a walk thru gate, they can cut the lock and get the hose through.e.

He said there was some kind of leak with the toilet and something about a hose being left on while he was at work one day.

Arbitrager gets hosed on rents, but still has to pay rent.The person arbitraging the property also has to think of furnishing a rental which is not cheap.