Serban

Hello.
I'm a Romanian which planned for quite some time to do a road trip
from Canada to Argentina. My intention is to buy the car in Canada/US
however I do not know what are the insurance options for such thing;
Canadian insurance companies do not seem to be able to insure the car
as I do not have Canadian residency or citizenship.
So, my question: Is it possible to buy a car in Canada/US without
being a citizen/resident of these countries and somehow have the car
insured too? What are my options?!
Thanks a bunch,
Serban