This is absolutely true, different businesses have orders of magnitude capital requirements to get off the ground. However the big change in the last decade is how many more scalable businesses are possible to get off the ground with very little capital. If you want to take a shot at something big, more power to you, but if you're a first-time entrepreneur personally I'd recommend bootstrapping. That practical knowledge of how to find product-market fit, even on a small scale, is infinitely more valuable than all the big-time planning you can dream up.