Supposing there were a really simple CMS; as simple as CMSimple, which you could buy for just $10? If it got 10,000 downloads, it would earn $100,000. Or you could buy hosting, with the thing already set up, for $10/month. If you sold 2 a week, after a year you'd have an income of $1040/month, $12480/year. (these numbers are arbitrary). Really easy to install, no database required, WYSIWYG, gallery, blog/news.