redthies
Renaissance Redneck
Are you building the vehicle for the vehicle, or are you building it for the destination? If it's for the vehicle, then do whatever feels right, and fits your sense of correctness and "feng shui". If it's for the destination, then where will you really take it? What do you really need? It's amazing how our sense of what is minimally suitable has ramped up over the past few decades. You can just about cover the globe in an old used Subaru Outback. Our rigs mostly look the way they do because this is as much a vehicle/equipment hobby as it is a travel hobby. Many times moreso.
Your stock Suburban will do just fine. Baseline it - really baseline the maintenance and all the systems (something many people are reluctant to do, opting for bumpers and winches and lifts and tires instead) - and hit the road.
I had to quote this, as it is the best summary of what is happening with the majority of people on here. I fall prey to the hype some times too, but really, it is not necessary to modify things to the degree most of us do for actual expedition travel. A properly maintained, and properly driven rig (including the op's suburban) should get us 95% of the places we want to go!