2. In the case of OP, she is financially supported by her parents. Assuming she is unemployed, would her parents' bank statements suffice in this situation regardless of who purchases the ticket?
The OP did not reply to my initial post where I asked if she is a student or has a job.
If she is a student, it is understandable that she does not have the personal financial resources to afford the visit. Her mom can financially support her visit.
Again, it is not a good idea to buy tickets before visas are issued. The OP's mom would need to prove that she (OP's mom) can pay for the OP's visit, including airfare.
I am also curious because I have a similar situation, except for my significant other.
Do check your visa application options (depending on your immigration status) before applying for a visitor visa for your spouse/partner.
Also, I disagree with you that purchasing tickets for the visitor indicates a weak financial situation of the applicant. Their financial situation can be considered strong in their country of residence, but for Canada, it may can be considered weak, and thus the price of a ticket could set them back.
Not true. Tickets can be cancelled once the visitor is in Canada. That's why it really helps if someone has a good financial situation back home.
TRVs are not evaluated as per the economic standards of Canada but as per the economic standards in the applicant's country