Small commercial spice operations use burr grinders very much like the "Bunn-o-Matic" only slightly adapted. You might want to take a look at the Mahlkonigs -- just to look, though. Mahlkonigs are beaucoup expensive.
I think you may be confusing burr grinders with propellor grinders. Propellor aka blade grinders have a little blade that whirs around like blender. Blenders have a set of grinding wheels mounted on a shat, set inside a tube above a lip. The spices or beans or whatnot, are ground against the lip by the wheel, and fall as "grinds" or "fines" down the shaft and out a chute.
At small quantities, even restaurant quantities, most people would use a propellor grinder for grinding.
Burr grinders generate far less heat than they're cheap cousins, blade aka propellor grinders. And good burr grinders come with a very precise and extensive range of coarse to fine control. There are hand operated burr coffee mills but they're way too slow for what you're planning -- not to mention the stress on your rotator cuffs.
Large commercial operations grinding continuous large lots use custom grinders with exotic cooling like liquid nitrogen. However, for your purposes, you should be okay running several batches through a decent burr grinder. If I were you, I'd contact Chris Coffee and ask them if they thought the Barzata Maestro could handle spices. Barzata's the minimum level of burr grinder I'd think about 100. I wouldn't consider a Kitchen Aid or a Cuisinart -- they're too poorly made. The next step up would be something along the lines of a Rancilio Rocky doserless, about $370, A bottom of the line Bunn without a doser is about $600 new.
If you buy a burr grinder, you'll have to go to some effort to keep it clean after grinding chilies. There's a product called "grindz" which you put through the grinder and does a fairly effective job. I use stale bread sometimes, which is almost as good. But sometimes you just have to take it apart and clean it. Which is a nuisance.
If you're not grinding spices in this amount in order to start selling your own dry rubs... Hey, wait a minute. You are, aren't you? [Ahem] As I was saying, if you're not going into the dry rub business, you might want to grind them "the Mexican way," which is to use a little liquid and make a paste in a blender, maybe with a few aromatics and seeds for good measure. If you use oil and "can" the paste it will keep a looooooooong time. I see blenders used these ways all the time in the joints I frequent. Commercial blenders run a few hundred bucks, They're nice for daiquiris also, which is a good thing for healing rotator cuffs. The other "the Mexican way" is to just put small quantities in the food processor and che sera, sera (okay, so that's Italian. So sue me).
Based on what you said you wanted, I'd be looking for a used, supermarket style (big, easy access top hopper, no doser, lot of grind adjustment range, runs cool) burr grinder. In other words, "Bunn" was a great suggestion to begin with. The only drawback is the do-re-mi.
Anyway, give Chris a call 518)-452-5995, they know as much about grinding as anyone on the planet. And they're friendly. They won't yell at you because it's a non-coffee question. They may not be able to help you, but they won't yell. That loud. Also start checking ebay for used, high quality burr grinders with a lot of grind adjustment range, and preferably without a doser. A supermarket size, type, style grinder would be the perfect amount of overkill.
Small quantities = Propellor grinder
Medium quantities (chili circuit quantities) = Inexpensive burr grinder, like a Barzata (if it will work)
Medium quantities for sale = Better burr grinder -- up to Mahlkonig
Regularity of grind not important = Blender
Paste = Blender or processor
Good luck,
BDL