Anon:
The Certification Maintenance Handbook is available for free from PMI:
www.pmi.org/-/media/pmi/documents/public...df-919b-c071b24accd7
None of us here can speak for PMI regarding your specific question. However, I can answer it from my personal perspective as one who has multiple professional certifications that require maintenance:
If your 35 hrs/month is part of your regular job, you will be limited to 8 hours of "Practicing in the Field" credit per CM cycle. If you are teaching the same 35 hours per month, you will be limited to how much you spent on developing the content up to the area maximum listed in the CM Handbook.
My advice: First contact PMI with your question, in writing for a definitive answer and get their answer in writing. Second, whenever a professional organization requires self-reported certification maintenance activities, claim the fewest possible of hours commensurate with the task.
Hope that helps,
Harry