When I did a google search for enterprise auto rental deals, I saw the link to the Enterprise car rental Canada site, that advertised Weekend specials from $14.99/day. So I checked the terms for this weekend special:
The terms for the $14.99 a day Enterprise Weekend Deal:
...offer is valid at participating neighbourhood locations in Canada only for rentals reserved in advance, ending on or before 3 February 2010.
Offer rate of $14.99 per day applies to an Economy car only and includes unlimited mileage within the province the vehicle is rented. Rental must include Saturday and Sunday. Sorry, this offer is not valid at airport locations and availability is limited.
So, this particular Enterprise auto rental deal would not be valid for the airport location, nor for the dates you're looking for (in April), nor would you get unlimited mileage because you would be driving out of province. I also noticed that when I was checking rates for Enterprise Car Rental Canada, the following statement: (I had plugged in a pickup for Apr
20-26 for a compact car)
VEHICLES ARE ALLOWED TO TRAVEL INTO ALL BORDERING US STATES. HOWEVER ENTERPRISE RENTAL CARS ARE NOT ALLOWED TO TRAVEL IN NEW YORK CITY. " (I wasn't sure if you had wanted to go into New York City, but I wanted to mention it!)
I have a feeling that unlimited km will be the biggest issue that you may face, with regards to your proposed rental.
I would suggest that you research other car rental companies carefully by checking rates for your preferred city, dates, times, etc. Look carefully at the rate quote for the mileage restrictions (if any) and make sure to read any terms or conditons that are provided before booking. If you're
unsure of any policy information, it would be best to contact a reservation rep through the car rental company's toll free number.