Honestly guys, we all have been there, through Bioshock I and II (I don’t care too much for Bioshock 3). All of these ultralibertarian freedom loving utopias fail at the same point, someone has to clean the toilets, dispose of the garbage and cook the meals. You can’t re-write tens of thousands of years of cultural evolution and dismiss the solutions we humans have come up with and pretend you have a better solution that can be implemented from scratch.
Unless you decide to live off the land as a hunter gatherer from the stone age there is NO CHANCE you can be 100% self sufficient. You can reduce your dependence on third parties as much as you decide to reduce your level of comfort and/or increase the amount of work to do daily to get those 2000 calories. Apparently a young and healthy hunter gathered could get enough calories working 20 hours a week, depending on geography and season but if you want other stuff like french wine or electricity to run your mining rig, someone else has to do it
Being completely self sufficient on a smallholding usually goes well until you get a busted appendix or a plague that destroys your crops. Hell, my grandfather was a farmer (and an excellent one) and although he practiced natural and organic farming as much as possible (use of manure, rotation of crops, manual labour with little mechanization, etc) he had no problems in blasting the potato beetles with pesticide because the potato crop would keep the family and livestock alive during winter.
Pesticide that came from a chemical supplier that manufactured it according to a very specific set of regulations regarding quality and safety…