When you're thinking about Infinity you're bringing in lots of computers. From my point of view computers and electronics don't go well with sand. I would enjoy it on road, but not really use it off road.
Which like I said isn't too much of an issue. Just replace the shocks on the cheap. You won't even get a light on the dash.
And then you should also listen to your buddy and sell everything you have and buy only vehicles from the 1990s