Few notes on patching.
No command-line utility can upgrade an older ESX or ESXi host to 5.0.
ESXi 5.0 hosts can be patched and upgraded (e.g. ESXi5.1) with the vCLI command-line esxcli tool.
The esxupdate and vihostupdate tools are no longer supported for ESXi 5.0 updates.
The vmware-vmupgrade.exe tool should not be used to upgrade VMs anymore.