Sorry for the long delay I have done this method and for one of our tech savvy customers they let them install it themselves and we then audited it later.
Since you are remoted into their PC you can see if they have security basics like anti-virus and the like. So I am not sure the risk is any different than trusting the customer they will not change everything you setup in person the moment you walk out the door.
Just my thought coming from the IT side, hopefully a compliance person will jump in with a thought next.
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