Financing tools are more reliable than a grant search. The Home Buyers' Plan lets a first-time buyer withdraw up to $60,000 from an RRSP toward a purchase, and the FHSA allows up to $8,000 a year to a $40,000 lifetime limit, both of which can fund a down payment or a suite build depending on how the money is used.
CMHC's minimum down payment rule, 5 percent to $500,000 then 10 percent above that price, applies whether or not a suite is part of the plan, and none of these programs replace the City of Saskatoon building permit a suite needs before it counts as legal, financeable space.
Joel Dyck can point you to the City of Saskatoon's current program list before you budget a Saskatoon secondary suite around one. Get your hand-reviewed valuation from Joel Dyck.