shutdown VMs and patch esxi host

I got a standalone esxi host to patch and need to manually shutdown the VMs, patch the host via update manager, wait for the host to patch, reboot then power on the vms back on

$vms = get-datacenter xxx | get-vm

foreach ($vm in $vms) {

   if($vm.PowerState -eq 'PoweredOn'){

  Shutdown-VMGuest -VM $vm -Confirm:$false

   while($vm.PowerState -eq 'PoweredOn'){

  sleep 5

   $vm = Get-VM -Name $vm.Name

   }

   }

   }

set-vmhost -VMHost $vmhost -State Maintenance -Confirm:$false

$baseline | Attach-Baseline -entity $vmhost -Confirm:$false

Scan-Inventory -Entity $vmhost

$baseline | Remediate-Inventory -Entity $vmhost -Confirm:$false -ErrorAction SilentlyContinue

get-vmhost -name $vmhost | set-vmhost -state Connected -Confirm:$false

$vm | start-vm -confirm:$false

Will this work. I also have a problem where a vm can get stuck in a shutdown state for a long time. I want to stop the VM if it does not shutdown in say 3 mins. How do i do this?