For your backyard mechanic:
A = 2-4 of beer, a full weekend, lots of bandaids, lots of cursing, maybe a
buddy or two and a 5 lbs hammer required. Be sure you don't need your car
for a few days.
B = A dozen beer, a full day, some bandaids, some cursing and a 1 lbs
hammer required. Allow an extra day of lost use of vehicle.
C = A beer or two, an evening and a 32oz hammer required. Be prepared to be
late for work the next day.