So for becoming independent, all is money problem.
So title question can be changed to
“How to earn enough money fastly for stand on yourself alone and hire another developers and finally become company?”
Make a lot of game? (What game? with only developer is yourself alone or 2 men startup)
Receive fund? (who give to you?)
How to earn 10,000$ a month minimum in this industry for stand on yourself alone and hire some others for team?
Make a good product (well it could be terrible for all that matter), market the product and get people to buy said product or find investors that will fund the production of a promising product you are making.
You could also go into debt and take a gamble, seek for cultural grants or do god knows what. There are no real way of getting these kinds of money, everything depends on your situation.
A good non-risk way is crowdfunding, but not every game can work with it, also you can go visit your local “ministry of culture” or equivalent(depending on where you live) and ask for funding, but that is even more niche, you would probably need to make something revolving around national history or public safety or things like that. I think World of Thanks got some of it’s early funding from goverment and also most of those " insert mundane thing here Simulator" games from Gremany are government funded.
Or like GMM said, you could bet the house, literally XD
Work in the industry collecting experience and contacts until your products are mature enough to support you not working.
There is too much heartache involved for most people to develop on the hope of making money then selling virtually none of their product.