Some banks who offer commercial loans usually also have a shorter payback period. 

I would stay far away from condos on the prairies period.

@Nathan Gesner- my current policy is to not rent to relatives and do periodic inspections.

If so is there a seasoning period on this?

Target a lender that can close quick without a long underwriting period.

Period.

That is the question, as refinancing may not solve the conventional loan issue. also many conventional loans require a seasoning period of 3-6 months.

For investment property HELOC's often the initial draw period is shortened to 5 years and the qualifying payment is shortened to 10 years.

Some landlords offered more expensive rent for a 9 month period but the math didn't really make sense (half month savings at most) compared to a standard 12 month lease. 

Helocs (as opposed to heloans) are interest-only for a period of time, usually 10 years, so during that time the monthly payment is lower on a DTI calculation than a first position mortgage with the same balance.