Ethan Roberts built a SaaS for wedding planners while working a full-time job in cybersecurity. He didn't have a background in wedding planning. He just started researching markets, talking to customers and looking for problems that existing software wasn't solving very well. Eventually he built PlanEase. He found his first customers through Facebook groups and cold emails. Over time, customers started recommending the product to other wedding planners. The business grew, but Ethan…