TexasCHLforum.com

The CHL class that I took was 6 hrs long max. And we did the range qualification first.

I know that the class used to be 10-12 hours, but the classroom portion is now only required to be 4 hours.

We had a gentleman in our class who was carrying an oxygen tank with him, and he performed fine.

I think that if he wants to do it, he most likely could make it happen, especially if he asks around and finds an instructor who will do the range qualification before the classroom portion.