The timing belt and water pump are each <2 hour jobs if done preventatively. Head gasket shouldn't be a problem if the pump and coolant are changed before they

The timing belt and water pump are each <2 hour jobs if done preventatively. Head gasket shouldn't be a problem if the pump and coolant are changed before they go bad. Anecdotal source; bought a 7 year old bmw at 123k miles (timing chain is still good at 185k), clutch is still good, brake parts cost $250, shocks less than $500, a valve cover gasket and oil filter housing gasket. Coolant expansion tank has to be replaced every 5 years ($150). My 10 years, 180k miles has been a better experience than many friend's first 5 years.