I’m not sure but you could try. I think a cheap processor could still turn nuts into flour, and after that it’s about going for a long enough time to get to butter. Maybe stop it every couple of minutes to make sure it doesn’t overheat. Try a soft nut like walnuts or cashews, not almonds (almonds are still difficult with a vitamix and you must roast them)

You could buy a midrange processor and separate blender for less than a vitamix. Cuisinart processors are very good. This combo machine is pretty good, I’ve used one, it’s on the small side so consider what quantities of things you’d want to make: https://www.amazon.com/dp/B01KA7VZA6/ref=cm_sw_r_cp_api_Mz.aCb3ZN472X I don’t like the Ninjas with the vertical blade thing