I've seen a couple investor prospectuses recently that claimed $1000 per annual case sold is one industry standard valuation (i.e. Deep Eddy selling for $350M with 350K cases sold annually). I've also seen successful equity raises by smaller distilleries that are comparable with that valuation multiple. Of course I believe High West just sold for $160M with 75K in case volume, which is more than double that "standard" valuation. So if you're selling 5,000 cases annually with ambitions to become a national brand, a value over $5 Million value does not seem unreasonable. You might also consider a multiple of gross revenue rather than case volume. Something like 6X gross revenue might be worth considering as a starting point for negotiations, i.e. $1M in sales translating to a $6M valuation.
Of course if your only ambition is to run a successful distillery-giftshop-cocktail lounge in your hometown, your valuation will likely be less dependent on your case volume and growth potential, and more dependent on your profitability and potential to generate dividends in a limited size market. It would probably be valued more closely with that of a successful local restaurant or bar.