The extra time in a multi-family purchase usually happens before the offer, not after. Confirming that a second or third unit is a legally permitted secondary suite with the City of Saskatoon, and getting real rent documentation instead of a verbal number, can add days or weeks to your due diligence period compared with a straightforward single-family purchase.
Financing can also move slower on a multi-family purchase, since a lender needs to verify rental income documentation and may require additional appraisal steps for a property with more than one unit. Building that time into your condition period avoids a rushed decision near the deadline.
Get your hand-reviewed valuation from Joel Dyck.