Tandem was in the service business, not the guarantee uptime business. So Spyglass chose to focus on Mosaic. You don't need an MBA to start a business. Take their advice into account but don't let them lead you. They don't know everything.
Lawyers are horrible.
Bran once had a lawyer spend several thousand dollars of HIS money to write him a letter detailing how if something went wrong, the lawyer was not accountable. He finally did find a lawyer willing to work at appropriate risk level. Hire a PR firm. Advertising is too expensive, sales teams are too expensive, some success with direct-mail orders. Interviews in magazines lead to inquires etc.