Manual entry for all menu items would be a turn-off for a lot of places.
They probably have the current menu organised, priced and described in some software (even just a sheet) so creating it again from scratch is a time-suck.
Didn't watch it all the way to the end but also didn't see anything about custom branding on the vid or homepage. That's important.
I've seen some agencies who have this as an automated flow on their site. Fill out the form with rough details of the product idea ~> get an estimate.
Our R&D dept offers this as a service, but tbh it hasn't generated much interest (but we haven't marketed it heavily either)