ignore everything they are telling you. but a 1-1.5 hp baldor motor. (the expensive part) 2 pillow blocks, a shaft that will fit the pillow bocks, a chuck, and a set of pulley wheels. you can make your own uber buffing machine. plus grinder. and you'll be able to set up mdf wheels, or leather, or cotton, or whatever you want. and that kind of hp should be plenty. i used to have a diagram of how to build it, but youll figure it out. its pretty simple.
otherwise grizzly sells one thats not too bad. i mean, its a grizzley, but you shouldnt care as long as it works. not like youre doing commercial work with it.
This is gonna sound kooky, but I come across these type of motors in used heating & cooling equipment all the time, pulley wheels included. Often they're brand new. If you know any h&c tradesmen, they'd probably be able to get you a motor from an old commercial rooftop unit for free & then you can set it up as Joe said. Pillow blocks can be found on these units sometimes, as well. Or (very kooky) I vacation in Nobleboro every Aug & would have room in my truck for a motor if you're a patient, stingy man.