I don’t think that counts as ‘staff’ unless the window cleaner works solely for her (like all the others she’s listed) That’s what I assume ‘staff’ means and none of the stuff she’s listed is out of the ordinary (but good on her for trying to sound rich).
I mean I could say I ‘contract out’ my grocery shopping as I have it delivered so someone else picks it for me. Or maybe ‘my personal shopper at Asda’ sounds even better.
Other stuff I ‘contract out’
Hairdresser
Dentist (I’d do it myself but I have the income so why not?)
Postal delivery