Just to throw it out there, I have a little over $5k in JUST the front end of my SAS (axle, gears, locker, install kit, coil overs, heim joints, metal, brakes etc) and that was with me already having almost all the steering for it and doing absolutely everything fab wise myself. Add $1500 for brand new Toyo M/T's, and your already at $6500 and you still have to buy a rear axle with all the gears and what not for that, wheels, drivelines, brake lines, shocks..... the list literally goes on and on.
I ran a body lift for a couple years with some pretty good wheeling involved. I had one bolt loosen ever so slightly. I tightened it with loc-tite, checked all the others, and never had a problem with it after that. I agree that body lifts get a bad review but if they are installed correctly, you will not have a problem with them. It is all about proper install and maintenance. Would I ever do another body lift? No, because I do not like the way they look, but that is it.