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A TRV doesn't consider "your" funds. It needs to be their funds you show.
Why not apply for a super visa next time? Then your funds and salary do count.
Had shown more than sufficient funds from both sides.

Yes thinking about applying Super Visa now
 
So in the case of TRV, how much should be the ideal funds to be shown per person per month?

You should be able to do the math. Here's an idea: (Airfare + boarding/lodging + local transportation/car rental costs + food + entertainment) divided by number of months of intended stay.
 
$10k per month per person at a minimum. Cash in the bank not fixed deposits or assets like property. See couples with $20k and a month visit still being denied.
And given the current atmosphere around immigration, the bar is going to be set pretty high these days. No more cursory reviews and a quick approval stamp. There's going to be some pretty detailed reviews of a lot of applications.
 
And given the current atmosphere around immigration, the bar is going to be set pretty high these days. No more cursory reviews and a quick approval stamp. There's going to be some pretty detailed reviews of a lot of applications.

Yup
Think people are in for a rude awakening when visas aren’t just rubber stamped like they were before .

People who’ve abused their visa conditions such as overstaying , staying for long periods, quasi living here , will have them cancelled before they get on an airplane to return to Canada .