Wow, KurtNYC sounds positively Tea Party-ish.
I would remind him though, that renters also share in the property taxes. If the renters vote to approve a property tax increase, thinking they're sticking it to someone else, they can expect a letter raising the rent.
And the other DUmmie was right, one bad tenant can wipe out a year's profit. This is due to liberal policies, which give the property owner almost no rights. To oust a squatter requires lawyers, legal fees, and lots and lots of time and money.