Quite possibly the landing was quite legal, with the owner’s approval of course.
However, now we come into that grey area of "airmanship" the blanket rule when there is no rule. Sounds to me like his "airmanship" may have been a little questionable.
He got the job done, and now can make 1/2 a payment on his machine but in the mean time, does a great disservice to the industry and generally pisses people off, all so as 'rich German' can have lunch. Those pissed off people are the same ones who remember that elitist event with sand in their eyes' and lobby to close the local helipad.
Now an EMS machine picking up a half drowned punter from that car park is a whole different event.