I would question some of the standard advice.

Regarding cleaning... I have had the best luck with using a lube that doesn't attract dirt and seldom "cleaning" a chain. Rinsing with any pressure at all or with solvents just helps the grit get deeper into the chain where it can do damage. I have had very good luck just applying lube (I like Boesheild T9) and wiping the chain off. Rarely if the chain is really muddy or something I might rinse it off with a hose with no nozzle and only the pressure of the water coming out of the hose (no using a nozzle or thumb to spray).

Regarding chain life... I expect to get 10,000 miles out of a chain and buy decent brands, but not premium models of chain. I am currently using an SMC that has 5000 miles and shows almost no measurable wear. I check it fairly often by measuring 12 links. If they get to 12-1/16" I think about replacing them pretty soon. I NEVER let them get to 12-1/8".

BTW the SRAM removable links are nice and work with other chains too.