There is a problem with selling alcohol at the garden gate is that as it is alcohol you will have to pay customs and excise the required duty on the product and also you will need a licence to produce alcoholic liquor. then you will have to have the necessary premises to produce it in and that will require an unbonded an elderly moment, should read, bonded site.
The cost of all the above would make it prohibitive for the average person IMHO.
Tala