Fair enough. Can you just elaborate about the countries you're going to cross and about how you're going to go past the Darien gap and Colombia? I assume you'll drive in Chile, if so don't miss the obvious (Atacama, Valparaiso) but also the Valle del Elqui in between, which is a great hideaway, far from the Panamerican (feel free to PM me if you are interested about cool spots in Chile). And do you plan to have the rig shipped back to the US, or will you be traveling all the way northbound?
And about making the big splash: I'm really thinking about it and it's not about money and time (I'll have both in two year's time), but two young children in the back seats might add a little to the payload, as well as the burden when it deals with safety. I'm all the more anxious to see how well you travel down there. Your blog is in my bookmarks already, looking forward to reading you. I'm impressed by your dedication. All the best.