He claims that they forgot to includes charges for a tank if fuel oil at the closing.

Here's a primer:The two basic kinds of paint of oil-based and water-based.

I have had to answer the infamous late night roof leaking phone calls, and dealt with: leaking toilets, leaking water mains, faulty electrical panels, broken water heaters, broken furnaces, underground oil tanks, troublesome septic systems, late rents, tenants dog eating the walls, unresponsive tenants and every other real or imagined rental horror story that people who are either too afraid or unwilling to, use as an excuse not to invest.