That extra lot size is the reason to look closely at Montgomery Place specifically, but it does not substitute for confirming the second unit's permit status with the City of Saskatoon, since lot size is a real value driver a valuation has to account for. A large lot with an unpermitted basement conversion is still an unpermitted conversion.
Once legality is confirmed, get real rent documentation and have a lawyer review title at ISC before your conditions come off. A home inspection, typically $400 to $600, is worth doing on both units given the age of housing stock in this part of the city.
Get your hand-reviewed valuation from Joel Dyck.