Westmount is a core neighbourhood immediately west of downtown, largely built between the 1910s and the 1950s, with older character houses, many of which were divided into suites decades ago. That history is the whole story of value there. A house with two properly separated, permitted units is a financeable income property. The same house with three unpermitted units is a compliance problem a buyer discounts heavily.
Practical due diligence beats a formula on stock this old. Confirm the permitted unit count with the City of Saskatoon, check fire separations and egress, look hard at the electrical service and the plumbing stacks, and get the insurance quoted before waiving anything, because insurers price older converted houses very differently from newer purpose built ones. Budget $400 to $600 for an inspection and $800 to $1,500 in legal fees to close through a Saskatchewan lawyer.
On the income side, tenancies continue under The Residential Tenancies Act, 2006, so you are buying the leases as they stand. Verify rents against actual deposits rather than a summary sheet. Then have the building valued properly, because a century old converted house carries decades of work that appears in no public record and therefore in no automated estimate, which is exactly what Joel Dyck's hand-reviewed valuation documents.