A friend of mine asking me a business idea, and he told me it is a big profit business idea, I'm missing out for not entertaining his advice! He told me everything would be smooth sailing, and very big profit too.
Let's be enterpreneur and make this a mind your own business (MYOB)
I also only want a business that is profitable as soon as I form it legally, register the entity, file for licensing, any paper work, legal business by laws (no selling weeds or explosive).
So the business should be: today I officially launch it, the next day, profit start rolling in, and it would last eternally, the income stream keep coming for the next 999 years, and it would be suffice to self sustain, self reliance include financing every operational cost by itself, and only happy ending. Not a single bad ending.
btw, no selling snake oil. Must have actual product, or service that is consider perishable. Also no to the Elon Musk's infamous tweets "You can sell stock you don't own, short selling is legal only for vestigial reason" bullshit or etc.
If you have a very good knowledge, you can achieve what you want. You opened your business today and if you want to make a profit tomorrow, people should pay you for your knowledge. So this could be a consulting service. This was the first thing that came to my mind. Apart from that, any business does not provide you with immediate profit. So that's a very difficult possibility.
It may be necessary to go through many difficult paths to achieve success. Your desire to make a profit immediately may lead you to the mistake.