RVV Ontheffing (Dutch national road-exemption permits) — ~10K/mo (the founder says "a revenue of 10K per month" and never states the currency; he is Dutch and invoices Dutch contractors, so euros is the likely unit — the video title renders it as $10K/month). Enough to replace a full-time consulting income; he went full-time in June of the year of the talk · ProvenStartups