I quit my job a month ago. Started a startup studio with a few buddies (business, sales, marketing, artists, developers, designers, product engineers). In our first month we made 50k~ish. We have a vodka brand we did videography for, a few startups we did product design for, UX, mobile apps, websites, everything.
Also allows us to exponentially build our portfolio and spend capital on expanding rapidly into new areas.
After the first few startups you start to get a sense of what your internal process looks like, this allowed us to ship products faster and charge more too.
This all started when I was working on a mobile app startup (single app) with my buddy and looked at him and asked "what if we sold shovels in the gold rush instead of competing in it?"
Best decision we ever made.
I should probably write a blog post.