There's been a few threads asking about this, maybe once a month (there was one just last week.) Yes there is a mill attachement for the kitchenade, the issue is, do you want to risk a $400.00 mixer motor, and a 150.00 ginder attacment to mill your grains?
We're talking the caddy of mixers. Poor hobby chefs like me get a chubby at the mere thought of one of those beauties...and NO I WOULDN'T CRUSH MY GRAIN WITH ONE IF I WERE PRIVALEGED TO OWN SUCH AN AWESOME PIECE OF CULINARY WIZARDRY.
Realistically even the most expensive grainmill, the barley crusher, which runs about 150.00 is Still cheaper that that, even if you cough up another 50 for a nice powerdrill.
The question is, are you single, or is there a swmbo involved? Only one guy on here ever used his, and yes, he was single and had bought the machine on his own, so he didn't have to worry about an angry partner.
Seriously, many of us either modify a 20.00 pasta maker or use a 20.00 corona grain mill and get great results.
https://www.homebrewtalk.com/f11/using-pasta-maker-mill-grain-75784/?highlight=pasta
Charlie papazain uses a COronna and gets 87% efficiency with a 20.00 grainmill like mentioned in my thread.
https://www.homebrewtalk.com/f51/my-ugly-junk-corona-mill-station-90849/