For UTDB in Houston, those are around the costs for the first 2 years only. They have incorporated the cost of the dental kits you purchase at the beginning of each year. These kits are full of the expensive expenable supplies you will use during the first 2+ years. After that, you buy very few things as your supplies are paid by the patients when you do some of their lab work. So, you can take off around $5,000 per year off the price you quoted for years 3 and 4.
As far as housing goes, it varies a lot. There are a ton of apartment complexes within a couple miles of the medical center. Student housing ranges from $500 for a 1/1 to $970 for a 2/2. In town, you can find apartments for in the $500's for a 1/1 or studio at the cheaper apartment complexes. or you can spend over $2000 a month at a nice complex for a 3/2. Right now, I live in a 2/2.5. Without the discount I got during a promo period, I would have paid $1,950/mo for it. Point is, you can pay a little or a lot for an apartment. You can find a broad spectrum of price ranges. How much you spend just depends on how much you are willing to spend and whether you get a roommate or not.