The farmshop i go to has never advertised and is only open 1 day a week, saturday mornings till 1pm. Place is packed. His secret is organic pesticide free and focuses on higher value fruit and veg so avoids any supermarket competition. ‘re animals i think he has just 1 pig that eats the waste and I think is for the owners christmas lunch.
Funnily enough in these times of austerity i know a few of his regulars and no one knows his prices, the veg is such a step up in quality from the supermarkets.
Stock rotates with the seasons and he just emails out on a Thursday what is avail, quite a few people email back a shopping list which can then be collected.
As a business it probably ticks over keeping 3 of them happy, he has a couple of helpers on the land. I have some photos if it helps,it’s the sort of thing if it ever came up for sale I may do.