Looks good!
Can I buy the software and run it locally? I'm extremely interested for a client, but there is no way they will surrender ownership of their content to a third party - and I sadly won't suggest they do.
I assume they could pay 150-300 bucks for a single-site license and something like 5-6 pages. Their website is very small. Honestly, cook up a license with per n-page fees and I'm sure you'll sell a bunch.