Argentine founder Nico operates ProductPrepa as a one-person team for product managers and designers, developers and marketers moving into product roles. A free assessment reveals skill gaps in about ten minutes, then the business sells personalized growth paths, courses and monthly one-to-one mentoring. TrustMRR lists $6,880 in LemonSqueezy-verified lifetime revenue, $2,054 MRR and 19 active subscriptions, with a one-person bootstrapped team acquiring customers through LinkedIn and X. The model converts a narrow audience, trust and high-touch delivery into revenue, but mentoring time, founder dependence and retention on a small sample still constrain scale.