I can say for fact that UPS does repalce starters and alternators as part of reg maint, I cpntraced to them for a while as a sub mechanic. As for me I dont replace these components till they fail. My personal vehicle, 92 F-150 4.9L auto 2 wd, has 274k and never has had a fuel pump in either tank. Luckey, maybe. I have had 2 Chrysler T&C vans in the last week with failed pumps. One 01 and one 02 both over 120k, failed fuel pumps. At the rate you are recommending you would have replace these pumps 3 times. I dont see any real savings, even if ya figuerd in the tow and a days rental car. I do STRONGLY recommend timing belts, hoses, thermostats, and such. These are failures that can have catastrophic consequences.