See my post in the other thread. Boots are a under $50 fix for all 4 (for parts and do the labor yourself).
If mechanic charged you more than 2 hours labor he was doing it wrong. If I can do one side in an hour with my limited tools, there is no way they can't do better, that is unless they have no idea what they are doing and ruin a perfectly good ABS sensor. This is their fault for not knowing how to remove the parts. I had a mechanic tell me the same thing before I knew any better. The idiot mechanic on my VX put a gear puller on the rear axles and kept pulling until he crushed the ABS sensor in half instead of removing the 2 10mm bolts that hold the ABS sensor in place and then the rear axle just slides out easily (no puller necessary). Removing and/or touching the ABS sensor is not involved with CV Boot repair. I got my replacement ABS sensor from Lisa (VXCrazy), thanks again Lisa! I betcha she has the fronts still in case yours doesn't work out. Oh and by the way I drove with the ruined ABS sensor in place with no noticable difference in braking at all :-) In fact braking was better because ABS was not working. This is the only car that I think "they" somehow got the ABS wrong on :-)
Oh and I don't think I would personally fix the other CV until it breaks. Isuzu cv boots are the only ones superior to all others for our vehicles.