Updated for the 15k price, didn't adjust for sale of Sonoma because I am still pretty leary about total cost, and likelihood of it coming about. I'm more of a bird in hand kind of guy, than two in the bush- but it is interesting how even getting relatively bad fuel economy is still fairly cheap when comparing to buying another vehicle.
Reread the site, so what is the cost for just your kit? I see the official Toyota price is a bit over $3600, for a nice new one, as little as 1500 from a site which doesn't mention any detail- seems like about 3k to get it. We are really getting off topic on our new official members thread.