Sure, if you’re willing to devote dozens of people to ’round the clock duty, forever. Better hope none of them has an off day wherein they can’t maintain the prerequisite happiness.
Now, if someone created a Charm that would replicate the affects of Patronuses w/o the need to constantly maintain it, or (Deathly Hallows movie pt1 spoiler) Hzoevqtr’f Cngebahf fuvryq was canon, or at least MOR!canon, that might be a different story
Confirmed:
The instructions also explicitly state that he has to take them beyond the edge of the Hogwarts wards for the cards work.