This only matters if you're scaling to meet demand and demand is higher than your spare resources, which often isn't the case for hobby projects. The 10€/mo

This only matters if you're scaling to meet demand and demand is higher than your spare resources, which often isn't the case for hobby projects. The 10€/mo VPS I've had for over 6 years now still has a few cores and GBs or RAM spare, so running a small model on the CPU for a personal project that only me and a few friends occasionally use wouldn't cost me a cent more.