Don’t stiff your mechanic. Your duty next time is to get an estimate in writing and advise your mechanic what your spending cap is, and any repairs beyond that are with your approval only.
Your mechanic has to eat, too. It’s not in his job description to alleviate your financial woes.
A torn boot means your joint is contaminated. I never replace boots. A torn boot on cars I service is an automatic CV axle replacement. They’re inexpensive to purchase and easy to install. The best time for a complete swap was 45 minutes, 07 Yaris, either side. The worst was 3 hours, passenger side of a V6 RAV4.