A well-maintained mid-tier air conditioner unit should be able to run for 15-20 years. And you can extend that lifespan by a) investing in a better air conditioner and b) making sure your unit gets the regular maintenance it needs.
The first point is easy to understand. Higher-end air conditioners are built to better standards and use more durable materials, which — in theory — can help the unit run for longer without experiencing mechanical issues.
As for what kind of maintenance your AC will need, that depends on the needs of the unit. Your owner’s manual will have instructions on how to look after the unit, and you can find more information online. Usually, the most you need to do is replace the air filters of the unit regularly and make sure your unit gets inspected by an air conditioning Kent professional at least once a year, as this website explains.
