Car dealerships WILL take cash payment but they prefer not to because of, as mentioned, the security risk involved with having a large sum of cash on site. There is a thread around here somewhere where someone asked if you paid in cash would you get a better deal and the answer was no, because of the extra work involved when dealing with cash.
As for reporting the income or RevCan looking into or being notified of the purchase of the vehicle for cash, you have to remember: you have to register it and plate it, both via a government agency. I can bet that somewhere we all have a digital file listing all our "registered" assets (anything that requires a permit/plate/insurance). I can also make an assumption that in that file, if suddenly you have 3 vehicles registered in your name whose total value exceeds your reported income by 200%, I bet the alarm bells will start ringing. Even if there isn't a file I wonder if the MTO employees are instructed to reported on persons with multiple vehicle registrations........
And Michaelzzzipperhead, go fuck yourself. I wasn't that far off. As someone said in a subsequent post, the tax owed on the money being inherited has to be paid before it can be distributed. If there is no tax owing, then fine. But if there is? The tax man takes his share......so, blow it out your ass...