Hi @silvain, 
thank you very much for your suggestion.
Yes, I was thinking along those lines too (see post #24).
Yes, I think you´re perfectly right.
With persistence created anydesk would have to be installed just once it would then be retained.
Thanks for the suggestion. 
But I guess that would exclude rescuezilla as persistence plugins seem to be available only for a handful of OSes (Plugin.persistence . Ventoy).
But it would work with ubuntu and some others. 
Thanks again.
Many greetings.
Rosika 