The other item might have been that your home might be more desirable to own than to rent.  

I think that is a great idea, but I would not sweat not owning, heck, sometimes I wish I rented so that I could call my landlord to fix items and use the extra Fannie Mae spot for another home.

I also should have known to look at these items as I've worked in Real Estate for awhile.

Or the CPA might help prevent you from claiming a depreciable item as an expense, which could get you into fine territory.A CPA can knock these things out with one calculator tied behind their back.

If he didn't want to be charged for the items then he should have had them repaired PRIOR to the move out date and when keys were turned over.What exactly is he arguing about?

Is there a law that specifically prohibits the closing company not to disclose the buyer's itemized closing costs ?

In addition, some operating expenses are not NOI expenses, so you need "above the line" and "below the line" to allow for those items, such as advertising and commissions.

You are wise to keep an eye on every line item, just be open-minded in your approach to handle each item.  

Find items that interest you and flip them online.

They won't know until it's closing day and they're hit with a line item they don't expect.