I did the Rubicon Trail in 1988(?) in a lifted IFS Toyota pickup with 33" tires and did just fine.
I understand the $$ part. After all I've thrown at my FJ40 (and I'm still throwing), I'd love to split costs with someone. I am seriously considering flat towing my 40 with my 80. Ride with me. Split the fuel and lodging costs with me an share the driving. It'll be a blast! I figure if my 40 craps out at least I have a way to get it home.
Heck, I'd even entertain 2 or 3 passengers. That would really lower the cost.
Let me know.