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In one lump can be suspicious. Don't overkill it. He is a student. 10k of Canadian dollars would be about enough.

Given it will be clear if isn’t money he earned not sure if there is a huge benefit of potentially transferring funds to him. Likely better off showing he is a student and supported financially by his father and show his savings. Also fairly rate for a young male relative to take on full-time caregiving role especially for an elderly female resident. Unusual that someone wasn’t hired to care for a family member part-time to be at least able to attend school.
 
Yes reception too after that. I am a PR. I only have just him being my only younger brother. My father lives in Dubai. He's been living there and working past 30 years. He visits us . No my brother never applied for any sort of visa. He didn't work because we were looking after our grandmother as she was the only one who raised us back there

Make sure to attach copies of any formal ceremony and reception invitations. Would apply asap because there is a good chance of refusal so you may get another chance to apply if denied and apply very soon. The fact that your father also doesn’t live in India creates more complications for his application.