It's unconventional for sure. The shaft drive and tires would suit an adventure bike. Is your goal a sport/adventure hybrid? What are your plans for finishing?
I think in this case you would really be riding the front wheel and letting the back wander around where ever it wanted to go. It would keep you busy.Riding position would be awkward for an adventure bike. My xs750 is scary buzzing down gravel roads and I can sit up haha! scary is fun though