Like Property taxes? Housing repair costs? HOA fees? Interest?
Generally speaking, most of those items are small expenses. We once had HOA fees, but I can't recall the specific amount, but I know it wasn't much. Interest is generally baked into the mortgage, so long as you know you're monthly payment, meh.
All I know is, one of my brothers went through a divorce. He had to sell the family home, and decided to move back to the town we grew up in. He found a fairly crappy (but livable) house to the tune of 30k-40k (mighta been less). He fixed it up, it kept him busy, and now he rents it out while living in a new house with his new wife. That house was a repo, and they saved significantly and have but some blood and sweat into and turned it into a nice home.
My brother is not a well to do sort. He has to pay child support and things of that nature which further limit his income. Dealing with renters is a pain in the ass for him, especially as he now lives 30 minutes from the place, but he has an investment that has value... and it has more value now than when he bought it.
I would agree with the logic that anyone looking for a place to live for a short period of time is likely much better off renting, but it you plan to stay somewhere for 3-5 years or better, you can probably find a nice little place in a smallish town nearby the big town you decide to work in, and have an asset that has value at the end of your stay. May not be right for everyone, but with renting you are simply paying someone else. If you don't report any problems, they're simply collecting a check and paying the mortgage and pocketing the rest. I'd like to be the guy earning an investment and pocketing dividends in that situation. Sure, some repairs will be a pain in the ass, but many of them are doable for most folks, or can be contracted out relatively cheaply.