Try TD insurance or Wawanesa - they both seem to offer daycare insurance and not mind if rented or owned home.

Side comment is that you must make sure your landlord know you running a business and get their permission in writing. Landlord renting out house to family/tennant normally know who living in house but running dayhome mean more wear and tear on property due to higher number people in it regularly. You could have tennant agreement cancelled for landlord not authorising use of property for business.