Just a suggestion
This is just a suggestion, but I think it would relieve a bit of the theme support headache you must get.
Why not create a few simple video tutorials. I imagine there are at least a dozen very common questions people have, who are just getting started with
WP and Classipress.
I personally use
http://www.jingproject.com/ (-Not an affiliate link.) and find it very easy and quick to use (and cheap). It literally takes me about ten minutes to create a video, upload to Youtube and embed it. A bit more time if I add any other effect (subtitles etc).
I use this any time I have a client ask me how to do anything. Create a quick video, upload it and send them the link. That way I don't need to keep sending emails back and forth (time consuming) and once the video is created, I can send it to anyone else who in the future has the same problem.
Just a suggestion.
... standing on the shoulders of giants
