Even that might be overkill. Static files served up by Nginx would do the trick nicely. For a brochure site that isn't going to see anywhere near as much traffic in such a short period of time ever again, a CDN is even overkill.
However, configuring S3 + CloudFront really isn't that much effort (I'd argue it's even simpler than Nginx).
It's not that expensive either! : ) It would probably even be within the free tier if I'm not mistaken.