If said company was truly innovative and satisfies the interests of consumers, I'm sure it won't have much trouble raising the cash necessary to continue being a law-abiding citizen.
This begs the question: what amount would be a barrier to entry into the market, 1 million, 10 million? Is there any amount of regulation and cost that you would consider a barrier to entry into the market? If as you imply a half million is not a barrier ("no trouble"), why is not a barrier, why is not a hurdle?
It takes upwards of $500k just to open a McDonald's franchise but they're still growing like weeds.