Don't buy $14 fans for the case, and don't use the cost of additional fans as the deciding factor as to whether or not you like a case. A good yet relatively inexpensive fan is the Yate Loon D12SL-12 fan, which can be found at many places for less than $6 per fan.
The only time that I would recommend a $15+ case fan is when you're trying to replace a dead fan for the CPU cooler. Even then, I would only recommend a few fans for that task.
The only time that I would recommend a $15+ case fan is when you're trying to replace a dead fan for the CPU cooler. Even then, I would only recommend a few fans for that task.