Those prices are better than I expected. When wife and I wanted to rent kayaks years ago we found it was cheaper to drive to hamilton and rent there (although you are then in the hamilton harbor so don't capsize). I'm not sure if you can rent power boats in hamilton. Lake ontario is a far different boating experience than cottage lakes.If you want to stay close to home, you can check out rentals at Harbourfront Centre for Lake Ontario.
Rentals/Charters - Harbourfront Centre
Toronto Harbour Nautical Centre (formerly Harbourfront Centre Sailing & Powerboating) has a fleet of sailboats, powerboats and yachts to suit your needs. We offer bareboat rental opportunities to the public with recognized credentials or equivalent boating experience. Our smaller powerboats are...harbourfrontcentre.com