The key is to have enough to fail. That’s why you see successful house flippers or whatever who started out with money. They may have started 2 or 3 businesses before they found what worked.
If you start out with only enough money for one business or house, you will be struggling for a long time because you have to make it work to survive. You have no money to expand if it’s a good idea and no money to quit and start over.
The best thing to start with is luck. Second best is enough money, so you can try several times.