update manager with no vmotion and local disk

Hi

I have a 6.5 environment with 10 different hosts. All hosts use local storage and have only one VM on them, expect for one that has vcenter on it. If I use update manager to restart the host, will v center shutting down cause a problem. I'm thinking its may be better to just use the zip file and esxcli commands to update the host, but I like to avoid that if possible. Its a unique environment meant for one application.