You can rent your property at arm's length for a year to year lease. You can generate income on the property, but it will be taxed, your income in Qatar should not be (depending on Revenue Canada's decision). You can have a Canadian driver's license, I have one, I have declared it, and provided the rationale to Revenue Canada on my non-resident for tax purposes form that I can't rent a car in Canada without one (most rental agencies won't recognize a recent GCC license). Capital gains is a whole other scenario, get expert advice.

I am not sure about being "automatically granted a Tax Free Status after being outside Canada for over 6 months" This is the first I've heard of that situation. Everyone else I've metin the past 20 years has had to apply to be considered as non-resident for tax purposes, and then when re-entering Canada has to declare their return (another form).

Again, check with Revenue Canada, they are the decision makers no matter what the rest of us tell you here.