Running your daycare all day wouldn't leave you much time for doing a job online. But you could consider something in the evening such as Tupperware, Discovery Toys, Avon, Usborne Books, or similar. That also gives you a chance to get out and meet other adults and means less need for care if your hubby is home in the evenings.
As for online courses, there is a course for family daycare available through the college - St. Lawrence in Kingston used to offer it but there is the Canadian Family childcare modules available through many childcare support groups. Our group in Ottawa does it by meetings but I think it is available online through the Barrie support group.