The HMMWV/H1 already has portal axles, take a look next time you see one.
The Unimog's real trick is that it's entire ladder-frame chassis has an extremely high degree of flexibility, allowing it to twist as needed to overcome terrain and obstacles. Still in production and use worldwide for over 40 years. That's a pretty good endorsement in itself!The 416 DoKa pictured in my earlier post is a personal fave since it's diesel, has the crew-cab and 3-way tilt bed. Front and rear PTO's mean you can put some major winches front and/or back, not to mention all sorts of other accessories. With ultra-high speed axles (good for 70MPH) an example like that one will set you back about $22K if ordered and built out by a reputable 'mog shop.