[ovirt-users] oVirt 3.6 to 4.0 Upgrade

In order to not hijack another thread I wanted to separate this from the "latest CentOS libvirt updates safe?" thread since this is different than what the OP on that thread wants to do. I've been digging through the 4.0 documentation since I'd like to upgrade in the not to distant future so I'm doing research and I'm confused. I'm running 3.6.6 in a hosted Engine environment. My engine runs in a vm on the host. The host is a physical box and the VMs are stored on a NAS accessed by an iSCSI LUN, I have no other hosts running so I can not migrate. According to this link, https://www.ovirt.org/release/4.0.0/, I'm told to simply run yum update ovirt-engine-setup and then engine-setup but I assume that's for a non hosted-engine environment. I then go to the link for Hosted_Engine_HOwto#Upgrade_Hosted_Engine guide and am told to do this. Set hosted-engine maintenance mode to global and other stuff that is written assuming I have some place to migrate my VMs to. I do not have another host. So how do I properly move to oVirt 4.0 from 3.6.6 on a single physical host running a hosted Engine VM? Thanks.