Running game/creative studio

Hi!

Real question - what do you need to succesfully run a studio? How much money do you need?
For example if I’m doing it all on my own and just hiring people to do the work for me.
I would be a creative director right? And what about legal side, publishing if you just gather pieces together to make a game? Can you even call yourself a studio that way?
I’m just really curious, I’ve been working alone and mostly doing artistic work, but it’s not moving anywhere and I realise that nobody cares till there’s some money in it all.
I would like to run a small indie studio with 5 people max at the start. Design, programming, business/marketing, music/art, writing and psychology.