I would highly recommend you look into airwave or at very least Aruba Central, Aruba central you can trial for 90 days before you purchase.
Honestly from experience if you are starting to get your users complain about AP's being down you need to look at some sort of monitoring either via Aruba Central or Airwave.
there are a lot of free SNMP solutions that are available which comes as plug and play. Ofcourse it wont come close to aruba solutions but these are something that you can look at for monitoring a lot more stuff than aruba wifi's. One out of the box solution that have really worked for me is observium.
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