Well, just like furniture, it is a cost you will incur even if you are in an apartment or house. Just like utilities, you pay utilities in an apartment, just like you do with a house. A portion of your rent pays for maintenance also.
I don't think you included cost such as (furniture, insurance, maintenance, drapes/blinds, electronics, stove, refrig, etc.) because these are cost you incur no matter where you live.
You basically include the cost that is associated with the property, less the cost of being alive (utilities, insurance, furniture, etc.). I would go as far to say it doesn't matter what the purchase price is, all that matters is the money you invested at the time of purchase.
Lets say you buy a car for $15K and you sell it five years later for $5K. Do you say you lost only $10K on the car? Or do you include insurance, property and sales taxes, registration, inspection, gas, maintenance, car washes, parking, tolls, etc? If not, then add all those expenses together and your total cost of the vehicle over 5 years would be $30K and you would have lost $25K on the sale of the car, not $10K.
I agree with that...
But the cost of insuring a house is significantly more than the cost of insuring an apartment. You can insure an apt for under $200/year.... A house will cost you 5-10 times that.