Hello. I'm Dr. Berry. Thanks for your question. Yes it is a good plan. It would be more desirable to treat with the ketoconazole for a month instead of just 2 weeks. When treating for a yeast infection treatment may be given for one month.
I just thought one month antibiotics was such a long time, but you think that is OK.
I typically treat a bacterial/yeast ear infection for one month with antibiotics and antifungal drugs and recheck the ears.