Admin themes licence

Greetings, I’m not sure which licence i should buy.

I want to use one of admin themes for build my cms administration.
Then, of course, I want to build web pages for my clients via this cms and clients will pay for creating these web pages. Once, after finish creating web pages, clients have access to administration for free.

So I think I have one end product (cms).
But I’m not sure if web pages created on this cms is counted as other end products.

Which licence should I buy?

Thanks a lot for answers.