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For an individual. I believe its be a lot of work, but totally possible. I would think that coming I to town to trade or buy supplies like anyone did for thousands of years.
That idea isn't unsavory. People need things that they can't make themselves. Unless you plan on having one person who specializes in a trade living with you.... Who might want to have their own house.... Who might live next to you... Oh wait, this is starting to sound less off the grid and More like A TOWN