The only issue I see with this nook is that the interior is going to be that hideous green. I am looking to move from my van to a chinook so have been watching these. To my knowledge there are currently four 4x4 chinooks for sale. Years ranging from 97 to 04. Prices ranging from $36k to $70k.
If you want to pay Ramsey or Chris to convert one for you there is a Chinook with the 7.3 diesel available right now. It is the only diesel nook in the country I know of for sale and is owned by a past sportsmobile owner. He is getting rid of it because he just purchased the ER2K.
The 7.3 would be the right platform in my mind to turn the larger tires and retain mpg's over 12.