If the cage is treated well - meaning no one is permitted to hang on the net or frame, & the motor is not abused with rapid start & stop activity, this system will easily last 25+ years.
The first item you will need to replace is the net, which can have a life-span ranging from 1-15 years depending on the quality chosen.
We recommend regular inspections of this system (which should be done with any overhead equipment), to ensure it is still secure. The frequency is dependent on your level of use, but annual inspections are advised.
More AirCage Retractable Batting Cage Frequently Asked Questions