So easy, you need a still that you can do it with. Its against the law still I think but it so much cheaper than the super incredibly taxed spirits that you buy.
They have websites once you distill the alcohol that sell flavorings to make your own Jack Daniels, etc.... I guess that people cant even tell the difference if you make your own, they have all kinds of flavorings and the cost after initial equipment means you can your own booze for pennies.
Id do it for sure b/c it looks fun but I dont drink anymore, as easy as making beer