When managing my personal expenses, I prefer paying costs once rather than paying for each transaction. I'll buy a car, rather than lease it. As a heavy internet user, I'll pay a monthly charge rather than a by minute charge. I'll own rather than rent. It almost always ends up lowering costs.
For business, it is exactly the opposite.
I prefer my expenses to be variable with my revenue. I choose Adword's pay-per-click over banner ads. I outsource activities rather than pay a salaried employee. I rent office space rather than buy a building. Even though it can sometimes end up as more expensive. Why? Because in slow times (like right now), these expenses are either naturally reduced or can be easily shed.
Another plus is flexibility. A big advantage small business has is being able to react quicker to changing environments. That means our expenses have to be able to change also. We can't be using an obsolete or irrelevant fixed asset just because we already paid for it.
Go variable, not fixed with expenses.