[dragandj]

I understand why you think that is the minimum. But, let's say that your mortgage is 100, building charges 10, and expected empty time cost another ten, 120 in total. How is charging 0 (not being able to rent it because no one is willing to match your minimum) better than, say, renting it for 110? I assume that you already own the property, so you have no choice of directing that mortgage to other investment opportunities.