Do you own a 12mm, 14mm socket and one or two others? That is how easy it is. YOU can do it all on your own. No joke, these fixes are less than a one banana. $800+ for 2 hours of work is robbery. Let alone, the $50 in gear oil that is $119+ on your estimate
These gotta go. $20 each + plus shipping. (Unless you think item is priced too high then we can work it out).
Alternator is original, tested good at napa $40
I would hate to throw this stuff to recycler.