You can start from a CSV that contains all the required info.
An example is in the code below.
Be aware that choosing the same Time for all vMotion, might stress your vCenter.
And the vCenter in any case will only actively run X-number of the tasks in parallel.
# CSV layout
#
# VM,VMHost,Datastore,Time
# VM1,esx1.domain,datastore1,22/04/2021 19:00
# VM2,esx2.domain,datastore1,22/04/2021 19:01
$csvName = '.\vmotion.csv'
$emailAddr = "lucd@lucd.info"
$si = Get-View ServiceInstance
$scheduledTaskManager = Get-View $si.Content.ScheduledTaskManager
Import-Csv -Path $csvName -PipelineVariable row | ForEach-Object {
$vm = Get-View -ViewType VirtualMachine -Filter @{Name = "^$($row.VM)$" }
$tgtDatastore = $row.Datastore
$vmHost = Get-View -ViewType HostSystem -Filter @{Name = "$($row.VMHost)"}
$startTime = [DateTime]::ParseExact($row.Time,'dd/MM/yyyy HH:mm',$null)
$spec = New-Object VMware.Vim.ScheduledTaskSpec
$spec.Name = "svMotion " + $row.VM
$spec.Description = "Migrate " + $_.VMname + " to " + $tgtDatastore
$spec.Enabled = $true
$spec.Notification = $emailAddr
$spec.Scheduler = New-Object VMware.Vim.OnceTaskScheduler
$spec.Scheduler.runat = $startTime
$spec.Action = New-Object VMware.Vim.MethodAction
$spec.Action.Name = "RelocateVM_Task"
$arg1 = New-Object VMware.Vim.MethodActionArgument
$arg1.Value = New-Object VMware.Vim.VirtualMachineRelocateSpec
$arg1.Value.datastore = (Get-Datastore $tgtDatastore | Get-View).MoRef
$arg1.Value.pool = $vm.ResourcePool
$arg1.Value.host = $vmHost.MoRef
$spec.Action.Argument += $arg1
$arg2 = New-Object VMware.Vim.MethodActionArgument
$arg2.Value = [VMware.Vim.VirtualMachineMovePriority]"defaultPriority"
$spec.Action.Argument += $arg2
$scheduledTaskManager.CreateScheduledTask($vm.MoRef, $spec)
}
