I'm in Laval, so not too far away...unfortunately I don't think anyone would respond if you posted in english on magarderie. Start by contacting the city of montreal to find out about regulations...how many kids (it's 6 with 2 under 18mos) etc. You will need a permit to be private. There will be some paper work to be done (references, menu, contract, program) and an inspection.
You can contact your local BC (bureau coordonnateur) if you wish to be a $7 daycare, however depending on where you are you can expect to wait a couple of years to be reconginzed.
Good luck. Let me know if I can answer anything else....different city, but Montreal and Laval work pretty much the same.