No thought about the Future.Funny, when I used to teach about Real Estate in NYC and talk about why you need to take into account the future economics, I emphasized it by using the animal kingdom.If a Squirrel knows that he needs to gather nuts before the winter, implying that he is preparing for the future, why don't most of us Investors look to calculate the amount of nuts we need for our future winters?

We replaced the AC Unit and ductwork (squirrels and eaten through it).

If you have a large property, you are more likely to encounter things such as unplanned property maintenance and repair, longer-than-expected vacancies or expenses incurred by irresponsible tenants.

Repair Costs: $47,610 Holding costs: $6,300Closing costs: $11,150Staging Fee: $2,300Total Pay Out: $37,640Construction Loan hold back: $29,000Insurance Claim $12,529 (Roof damaged in Wind Storm) unplanned replacement and tree removalBank allowed me to keep my 20% down payment at closing, which would have been $15,000 due to total amount requested for repairs being $44,000.

I've never heard of a coon or squirrel making wire disappear.

I have successfully squirreled away a decent amount of savings, so I would be able to enter a moderate market with several properties free and clear. 

Cedar Park and Squirrel Hill are where university of science is .

It is still painful when you get a sewer and an unplanned roof at the same time, but is still doable.I am with @Jonathan R., I could NEVER do a $550 per month repair budget. 

Your expenses are going to be all of the money that flies out of your wallet, whether planned or unplanned. 

So I have had a fair number of animal problems, beavers squirrels,bats, raccoons.