Ask HN: How many LLCs for my different ventures?

Hi!

So I have a lot going on right now!

I have a freelance business I'm working on that I want to expand into a full blown consultancy agency and hire help, etc.

I also created a new invention that I want to market.

Finally, there's a startup I want to work on and create.

How many LLCs should I have? Should I just make the 1 for all of them? Make 1 for now and then create them later on?

Is there a one correct answer or is it sort of up to me?