Well if the axle or CV joint is grinding and the boot is just torn as you know they sell the boot kits. However I think your problem was really the process and not the parts. In the last case the axle/joint could have been going depending how long the boot was ripped open exposed to the elements like water, sand, and round grime so it could have been on it's way out anyway.
Did your local mechanic give an explanation why he just replaced the whole axle other than "might as well". He could have just been trying to make a few extra bucks which is a complete assumption on my part he could be the most honest guy in the world lol
I've had other imports in the past and the boots have ripped a good rule of thumb on them was if you catch earlier you can save some money with a cv boot kit for like $50 vs buying a whole new axle.
On our BMW's the axles are more expensive than other cars where as the whole axle can cost as low as 100 bucks lol So it's normally just worth it to replace the whole thing vs buying a 50 dollar kit being you have the whole thing apart already.
With all that bullshit said if your axle is clicking or making any noise whether it be on turns or not the axle is already done anyway and just doing a boot kit would be pointless.
I think your hang up is "Do I want to waste money buying a CV Boot Kit again just to end up bringing to my local mechanic in the end?"
Hence wasting money on the kit in a effort of futility. So sounds like your doubt lies in the ability to DIY being burnt once already.
For you it comes down to this.
1.) Does the axle need replacing? If no see (2.) If yes see (3.)
2.) Can I trust myself with second attempt on a boot kit?
3.) Do I let my mechanic replace the axle for me again?
Oh you might be able to get a boot kit cheaper other than the dealer just depends on the part store. I'm in a good unique position though my friend runs a local parts warehouse where the dealers get their parts so I get some good deals. Even though most warehouse parts places sell to the general public and are cheaper anyway as they just deal strictly with parts (no tools or other crap just OE/Aftermarket parts).
I would just see if there is a specific OE brand you need and ask if they can get it if this is your concern.
Hope this helps your position
