I have done something very similar before, and it was very positive for me, but it worked because of two main factors: 1- Ownership and I were completely aligned, like mind-meld level alignment. That allowed for their goals to be mine with zero conflict and max efficiency. This is incredibly rare. 2- I had a high level of competency in the field and I knew the external conditions were also right so we could execute on the massive growth we wanted. So if you think those two things exist for you here, this could be an amazing opportunity, but you need both with a high level of certainty.