Even at a small level, entrance into the wine industry is a capital intensive and effort intensive undertaking.  Purchasing premium barrels and grapes is expensive.  Equipment and space, even if you are initially renting, comes at a cost.  Let’s not forget packaging:  bottles, closures, capsules and labels add up quickly.  Finally, you have sales, marketing and overhead.  Oh yes, one more thing, you need to put this money out a year or two in advance before you ever see a dime of income.