NO. You need a connection to "log in" but if you did that at home where you had one, there should be no reason why you cant fly. If you logged out and then tried to fly without internet thats a problem If you were logged in already you shouldnt...
Things look pretty small from even 400' altitude. If the client wants a Google earth style view of a large area, usually, I just fly a pattern and make a photomosiac - no need to exceed 400'. That way, you also have much higher resolution than a...
Yes, this document is a must to read before the exam: Appendix A particularly
https://tc.canada.ca/en/aviation/publications/flight-reviewer-s-guide-pilots-remotely-piloted-aircraft-systems
That's good advice, especially at night when the drone can get confused. But there's still an issue if you lose contact with the drone for any reason and it tries to RTH on its own, then the OP could be in for a world of hurt while it "hunts" for...