There are shops out there that sell tutorials:
are just a couple of best known.
So I would ask myself a question: what do I specialize in: web hosting or tutorials?
If you do not intend to make a living making/tutorials, I would focus on developing and running a web hosting business instead of spending time creating custom tutorials.
If you intend to launch the project and compete with the above named tutorial service providers professionally (who do that full time), then it would probably be beneficial of you spending the time.
I am assuming that given the success of DemoDemo and DemoWolf, you can sell tutorials based on Cpanel, WHMCS, etc. Unfortunately I wouldn't know the software they use.