With this idea in mind, it’s a good idea to program your GPS to take you via I-95 and I-87 North. That way, you’ll be able to adapt to changes in traffic conditions and your own need to rest without completely reworking your directions.
However, it will still take you at least 22 hours to drive between Florida and Montreal, so you’ll need two days on the road at the absolute minimum. You might also consider taking a plane instead. It will likely cost you well over $300 to drive from Florida to Montreal—not including the price of a hotel, food, and any unexpected problems along the way.
You may be able to find a plane ticket for less than the price of gas, and the trip will be much shorter that way!