Have you ever harvested walnuts? It sucks to get any sort of quantity put together.
First you have to hull them, this will leave your fingers stained black for weeks even with gloves.
Then you have to dry them for a season, which involves either keeping the squirrels away constantly or a bucket taking up space in your house for an entire season.
And finally you have to shell them, which is not an easy or repeatable process. Doing it at home by hand will lead to a nice powder of shell and nut that you have to separate before you can eat a single walnut.
Forget all that. If someone wants to do that as a job so that I can buy them for 10 dollars/lb bagged in the store then be my guest.
“50L bag of nuts”
Oh you’re European, so you’re likely talking about the english walnut. https://en.wikipedia.org/wiki/Juglans_regia
The harvesting process is very different from the black walnuts that we have in NA. https://en.wikipedia.org/wiki/Juglans_nigra
Your walnuts will be much easier to hull and much easier to shell. Enjoy.