Always consider what you can't confirm!

I was just talking with a fellow investor today about buying destressed properties and he was asking why in specifically look for them. After I explained my stance for a bit he brought up something that I was lucky to learn before I ever started, ALWAYS CONSIDER WHAT YOU CAN'T CONFIRM! When investing in class D properties a lot of the time there are multiple things you are not going to be able to confirm, for example, if the water is not turned on then you will have no way of knowing if there is a leak in the system or if the hot water heater or any of the appliances function properly. If you can not confirm it you must consider it into your budget or it will bite your profits and could make a good deal bad.