Why are you guys talking about individually 3D printing and acetone vaping each individual one? You get one master, then recast it in resin. Sell it as raw kit for semi-cheap, or as finished figures for a lot.
I don't think the economics of their production are really the problem, they're cheap enough to make if you know what you're doing. The problem is the cashcow furries aren't going to want generic wolves and lionesses, they're all going to want their own custom figures of their shitty OCs, which means you wouldn't be able to mass produce them.
Silicone is expensive, yes, but a 5 inch figure is unlikely to need more than 20-40 dollars of it (depends on how much you break up the model really). And if you're getting only 1/3 successful pulls, then you either have the shittiest mold designs or you aren't vacuuming your urethane and pressurizing your castings.
But yeah, as a whole, it is way harder than people think it is. And unless you're able to market yourself as well as Bad Dragon dragon, I don't see these as really being worth the time.