We had been paying roughly 400 euros a month for a managed ETL connector to sync our CRM data into BigQuery. Six tables, a few thousand records each, updated a handful of times per day. The connector worked, but it had problems: data landed in a US-region dataset (we needed EU for GDPR compliance), the CDC implementation had quirks that caused phantom duplicates, and every time we needed to debug something we were staring at a black box. So I replaced it with a custom Cloud Run service. The whole thing runs for under 5 euros a month.