Isn't that period already over? It seems like it's already the case that without significant cash outlays, one cannot expect to make much return from bitcoin mining. The gold rush period was a year ago, when people could make bitcoins easily with little hardware outlay, before almost anybody even realized that bitcoin existed.
It's weird how bitcoin compressed the 'gold rush' period that for real gold lasted over centuries and had the effect of moving people all over the globe, and also enriched millions of people, into a year period in which a couple thousand people got all the spoils for doing almost nothing except burning cpu cycles and power. Weird and in some ways sad.