VB, with a lease and your weather, unless you do not plan to drive it in the winter, expect to get hit with turn in expenses for winter damage, plus one psin off road due to snow/ice, and they take more off, even if a body shop does a good job of repair.
I agree with Eddy. These people paying top price for high demand Priuses are not going to realize any savings in any realistic time period. If this was your first new family car then you might be ahead. To trade in or sell a nearly paid off 3 year old SUV that gets 20 mpg, and then turn around and pay for 3-5 years for a new Prius at about 300-500 month, the loss and difference will buy a lot of gas. Plus you have the vehicle you really want. Currently I have a 2005 Denali, 2004 Wrangler Sahara (6cyl), and a 2003 Volvo C70 Convertible. None of these cars gets over 20 mpg. Why not sell and get a Prius? I paid cash. The loss is not worth it. And as Eddy said, hit me in my truck or Volvo, and I am sure I will do fare better than if I was in a lightweight hybrid.
Also, my neighbors have asked if I plan to get rid of the 2005 diesel motorcoach. I told them no, I would lose more money than I care to, plus, fuel is not that much for a trip if you make your trip's stay a little longer (amortization of costs theory). Example; if you take several short trips you will use mroe fuel than if you took less, long trips. If you drive 400 miles and stay 3-4 days, and end up doing this more often, then you would use more fuel than if you took a trip 400 miles, but stayed 1-2 weeks.