Pool Heat, Early check in/late check out, Pet Fees, etc etc are all ala cart and available for a fee. 

We might have the AC units inspected if the property was 15+ years old, make sure the water heater is less than 6 years old, that kind of thing. 

It ranks right up there with swimming pools and tree swings.  

- 3/2 - all Brick - No Flood Zone - No pools - No Deck - Built in 2006Original tenants have remained in the property with yearly increases to rent.

I moved in with no heat, no water, and a very poor electrical situation but by this time i was working for my mentors construction company and had an abundance of resources at my disposal.

To answer your question I've never counted, but over the many years this seems to be something that pops up, along with missing furnaces, and missing hot water heaters. 

@David C.About once a year, I post about finding some absurd amount of money inside the wall of a foreclosed house or behind a water heater in a dark basement.

Water bills are up 50% to 100%, electric bills are up 33% and gas bills are up 30%, and of course tax bills are up and new bills for new items are created. 

:Class A Properties:Cashflow vs Appreciation: Typically, 3-5 years for positive cashflow, but you get highest relative rent & value appreciation.Vacancy Est: Historically 10%, 5% the more recent norm.Tenant Pool: Majority will have FICO scores of 680+, zero evictions in last 7 years.Class B Properties:Cashflow vs Appreciation: Typically, decent amount of relative rent & value appreciation.Vacancy Est: Historically 10%, 5% should be applied only if proper research done to support.Tenant Pool: Majority will have FICO scores of 620-680, some blemishes, but should have no evictions in last 5 yearsClass C Properties:Cashflow vs Appreciation: Typically, high cashflow and at the lower end of relative rent & value appreciation.

You will not get a lot of responses on here for several reasons - too many questions, not a big enough pool of people to answer the questions, and most agents have no clue about what it takes to work with investors.