A core team of passionate, true believers will always go the extra mile for each other and by extension the company they work for. People will stay at jobs they dislike if they love the team. those first few hires are going to be key ones. Those people are practically partners. You need them to stick it out through thick and thin, and be as devoted as possible. You need them to create the culture and spirit for future hires. You need them evangelizing the business. You need them taking ownership. You need them to be the driving force of success.