A narrower buyer pool is the main factor. Fewer people are shopping for acreage living with well water and septic than for a standard city lot, so the pool of interested buyers for a specific Corman Park property is naturally smaller, which affects how long it takes to find the right one.
Financing and inspection timelines can also run longer for an acreage than for a city lot, since a lender may require a well water quality test and a septic inspection before approving a mortgage, and scheduling those adds real time that would not apply inside Saskatoon.
School busing and road access are worth confirming early too, since Corman Park's own rules govern the property, not Saskatoon's. Get your hand-reviewed valuation from Joel Dyck.