I don't know the answer to your question, but I would suggest that if no one answers you email the program coordinators who should be happy to help. I would suspect that you're unlikely to have more than one whole day off a week (and maybe not even that), but my knowledge on this is not current. Good luck!
I should add that if you truly can't stop working, you might want to look at Loyalist's program. Again, my knowledge isn't so current anymore but they did have a program a few years ago that would be much more conducive to working compared to Centennial or Humber. The educational quality of Centennial and Humber is unlikely to be matched though.
And I'll add one last thought while I am here, are you aware of the current job market for paramedics in Ontario? This should be an important consideration before diving into this career change.