Is there a list of known startup costs of successful business enterprises?
For example, it is known that Hap Klopp purchased The North Face for ~$60K before scaling it.
It is known that Sarah Blakeley started Spanx with $5,000 in savings.
Any others?
There are a bunch of Indie Hacker interviews that go into detail about how they've gone about their business. Most of them including how they managed to get started.