The bridge loan route needs a firm sale in hand and a lawyer regulated by the Law Society of Saskatchewan administering funds through a trust account at both closings. Lenders generally require a signed, condition-free contract on your existing home before approving one, and it is repaid in full on that sale's closing day, often within days of your new purchase closing, on top of legal fees typically $800 to $1,500 for the purchase and sale themselves.
The rent-back route needs the buyer's cooperation instead of a lender's approval. Daily rent, length of stay and the condition of the home at handover are negotiated as part of the purchase agreement itself and confirmed in writing by the lawyers on both sides.
Which one fits depends on whether your own next home or your buyer's flexibility is the tighter constraint. Get your hand-reviewed valuation from Joel Dyck.