I spent the last decade inside VC-backed startups, one of them a construction general contractor, helping founders build the systems, processes and teams that let a company grow. Three of those companies have exited in the past five years, to Toyota, Opendoor and Qualtrics. Now based in Idaho, I'm buying a business of my own and coach a small group of owners. I built a durability diagnostic that measures how dependent a business is on its owner.