In Canada, you need a "SFOC" - Special Flight Operations Certificate" to fly commercial in almost all urban and built up areas. Out in the country, in Class "G" airspace, might be different as long as you have your commercial insurance.
Again, in Canada, if you want to go commercial, I highly, highly, highly recommend you take a ground school course. The one I am taking cost $250, text book another $100, and some charts and maps will likely run you anywhere form another $100 to $200. You will need other publications, but those area almost all online, in PDF format, and downloadable for free. The one I am taking gives you 9 months to finish, but after three months, I am about 50% through.
What you need to look for is this, quoting: "The course is in compliance with TP 15263E (08/2014) Knowledge Requirements for Pilots of Unmanned Air Vehicle Systems UAV 25 kg or less, Operating within Visual Line of Sight."
Once you get that under your belt, trust me, things are much easier.
Another thing to consider. Putting words in the mouth of Transport Canada, their attitude seems to be this: If you are a hobbyist flyer, no problem, but if you go commercial, then you are a pilot, and you will be a pilot, training and all.
Hope that helps a bit. I think the world of drones / UAVs will explode commercially, so now is the time to jump in ahead, but you have to decide what way you are going.
good luck