kvm / qemu / libvirt vm smart startup delay / boot order control in virt-manager / xml config

I'd love a simple gui spot to enter the startup delay for each vm. But why stop there, the system has soo much great information that we could use to make a "smart" startup delay. I'd like a startup delay that allows me to choose a time or parameters that need to be met to startup the vm. For example. The most important to me would be load. Delay startup for 10 minutes or load less than 5.

I know this is a trivial thing to put in place, just pick your startup script and write:

sleep 60

virsh start sv100

To add the load check just a simple bash loop.

The delay would add another feature in hyperv (I assume in the rest) and the smart delay would be better than hyperv :).

BK