The ongoing side is modest but real. Hosting and a domain might be under $100 a year for a simple site. Maintenance depends on how much the site changes and whether you handle it in-house or pay for support.
Think of a website like a vehicle, not a poster. The purchase is the start. Keeping it running well (updates, fixes, improvements) is what protects the value of that initial investment over the years it's in use.
Updated July 2026