Client management and alerting

Good morning all,

I'm still new to the EPMP line and getting more familiar as I go, but there are still a few things that I haven't been able to find a reasonable solution too, so just wondering how everyone else may be dealing with it.

 - How are you getting around the CNS limitation of DHCP assigned clients.  Currently I just go and delete them out of my console on a weekly basis and let the server refind them.  Probably not ideal, but I'd prefer not to give my clients a static IP if they aren't paying for it.

 - Alerts?  What are you using for alerting on AP's and clients that go offline?  Is there a better tool for monitoring and alerting on specific statistics?  Utlilization, up/down nodes, etc?

Thanks for your feedback,