I cant imagine the amount of stress and sorry to hear of this. This wont fix it but it may give you more insight to what is wrong, get a helper and measure from front tire to rear tire on each side then try to get the front tires straight to the rig and measure diagonally at the same contact points. If possible, try to find equal points on the frame with which to take diagonal measurements to see if the frame is "racked". Also measure from the center of the rear leaf spring to the hanger to be sure you dont have an issue with wrong spring center pin on one side. some springs will not have equal distance from the center pin to each end. You are looking for a reason for the rear axle to be sitting crooked to the frame.
I have built rock crawling jeep xj's and performed the alignment with a tape measure and good straight pieces of steel. We drove it 40,000 with normal tire wear. You could have a serious frame issue or a relatively easy fix. It doesn't mean you can do it yourself in the driveway but it may not be so bad.
Another thing to do is use a straight piece of metal laid along the side of the tires to see if they are parallel to the side of the rig or if they are noticeably at an angle to that or the other tires. This is crude but it's an indicator of big differences.