I just found out that my homeowners will be canceled if I continue...?

You may be able to purchase a rider to your existing policy. Here's a good article about insurance for small business operating out of a home:

https://www.entrepreneur.com/article/...

When I first started Rover I called up my ins. agent & asked if I should have extra insurance because of dog sitting & she told me, "off the record" Do Not Even mention that you are doing this or your insurance will be automatically cancelled. She had no real explanation, just said that's the way it is.