HotSpotManager.ps1

$connectionProfile = [Windows.Networking.Connectivity.NetworkInformation,Windows.Networking.Connectivity,ContentType=WindowsRuntime]::GetInternetConnectionProfile()
$tetheringManager = [Windows.Networking.NetworkOperators.NetworkOperatorTetheringManager,Windows.Networking.NetworkOperators,ContentType=WindowsRuntime]::CreateFromConnectionProfile($connectionProfile)
$StartupTimestamp = Get-Date   #* Remember the time, when program started

while($true){

    #* Check Mobile Hotspot state and test internet connection
    if (($tetheringManager.TetheringOperationalState -eq 'InTransition') -or !(Test-Connection internetbeacon.msedge.net -Quiet)){ 
        
        #? You can delete TestConnection sentence, if you don't need it, because it will reboot your pc
        #! Rebooting PC, because Hotspot may stuck in 'InTransition' state :(
        Write-Output -Verbose "I will reboot your PC in a few seconds, because Mobile Hotspot is bugging. Kill this window to stop it :)"
        Start-Sleep -Seconds 7
        Restart-Computer -Force

    }
    elseif($tetheringManager.TetheringOperationalState -eq 'Off'){
 
        #* Start Mobile Hotspot
        $tetheringManager.StartTetheringAsync()
        Write-Output -Verbose "$(Get-Date) --- Wifi set to On              | Startup Time - $StartupTimestamp"
        Start-Sleep -Seconds 600
        
    }
    elseif($tetheringManager.TetheringOperationalState -eq 'On'){

        #* Stop Mobile Hotspot
        $tetheringManager.StopTetheringAsync()
        Write-Output -Verbose "$(Get-Date) --- Wifi set to Off             | Startup Time - $StartupTimestamp"
        Start-Sleep -Seconds 7

    }
}