There is no stage in life when one can boldly say, that he or she is financially free. financial freedom is a word that does not exist in my dictionary. No matter the amount of wealth you have, there is something you can't still buy with your money. Remember, a man that plans to relax now, lives to regret in the future.
So, invest, make more money, and live happily
I don't really agree with that ideology, people who have a lot of businesses that are earning passive income for them have financial freedom which simply means that they earn a lot of money and you are free to spend it on anything they want, it doesn't mean that you should be able to buy the whole world with it, but if you can spend your money the way you want and you have enough to satisfy you needs and wants, you have financial freedom.
And what you say at the end says it all itself, invest, make more money, and live a happy life. Living a happy life after making investments and making more money is what we would call financial freedom, you can't enjoy your life if you are bound to something and cannot spend what you earn or whatever.