As usual, if you're well-off you have extra options. Get $500k to buy some property (which you can then rent) in Portugal or Spain and you get residency (and later can apply for citizenship).
Then again, if you have access to $500k, the safety net is probably less interesting.
There is also an entrepreneur visa, though you have to have funding via some of the approved venture firms.
QC will add its own rules -- they have their own Immigration Dept. -- but if you have a lot of money to spend you're probably not going to Quebec anyways, since their taxes are high, even by CAN standards.
$250k. But why go this way? You're limited to live in those southern european countries. You can't live e.g. in Netherlands with golden visa of Portugal or Greece.
Then again, if you have access to $500k, the safety net is probably less interesting.