Heeeey all chicken roasters, don't you have exhaust fans above your stoves? It's the single most useful thing to have when roasting in the kitchen, whatever the roast method
Never done Whirley-Pop, but I have done this, which is basically the same thing, only it is an actual coffee roaster:
We used it outside, on a bbq grill, since the lovely old iron stove in the summer house hadn't got the proper hole in it for the roaster - yet. I don't consider smoke a problem at the weights you are able to roast in a whirley-pop or an old roaster like this, but chaff, I must admit, could become a nuisance. Better to put the coffee in the oven in that case (and roast below 300g, and if possible, don't use fan heat. Gas oven is fine though). Just open the window and let the chaff blow its way wherever. If you are blessed with a garden, you know what to do. It's natural stuff, let it return to nature
P.S. If you use a half-size oven tray and stop before rolling second smoke-wize you should be on the safe side. Please use the exhaust fan