(Bloomberg Businessweek) -- This April, more than 600 landlords, real estate agents and small-property managers traveled to a swanky resort in San Diego to get advice from Jesse Vasquez. A former salesperson at a hospice-care company, Vasquez now manages more than a dozen properties, in addition to his side hustle coaching his peers. The key, as he laid out in a stream-of-consciousness presentation on success in real estate, is reduc...