You have two easy choices:
1. Use the content with the Creative Commons license already provided.
I always post a license with my writings and photos, so this should not be an issue.
2. Contact me to propose different licensing terms.
It is not always about the money, I have approved commercial use of my photos and writings in the past. I will consider your proposal on a case-by-case basis. You can contact me at:
pedro.vera@gmail.com
Please state in your subject line that it is a content licensing inquiry.