Congrats on your new purchase.
BTW, on that aux. fan switch, I would leave it connected, but check out the function. If it's the same as mine, it is a three position small toggle switch. In the center position it defaults to the automatic (stock) function. In mine, the left position indicates single fan operation (there are two fans), and in the right position it turns both fans on. You can check this by listening with the engine off. This control comes in handy once in a while, especially here in the south.
I would leave it connected, as it's probably not in a place where it is obvious anyway, (except to NCRS scrutineers)
On that salvage title. After very careful examination there is always a price at which any car is a "good deal". But the price has to reflect the attitudes expressed above about salvage titles. It may make a car way harder to sell. But if you're a keeper, not a flipper, it might be a chance to get a car that's much better, and cheaper, than you thought you could afford. Just sayin'
