You need feed stocks. Those are provided by big B2B companies. Whether it's wood, aluminum, plastic, lubricants, etc... The personal fabrication revolution hasn't happened quite yet. If it did there would be incentive for suppliers of feed stocks to market to individuals or small communities.

Correct, both assertions. But I'm fairly confident that feed stock can fall in price to a very acceptable point, including metal feeds for the metal printers (which I really really want). And for polymer feeds, I think we can make that ourselves. Its part of why (small part, but still) I've begun studying biology. I think most of the missing pieces for me are in this field.

Fortunately the ability to make boats from other materials exists, as with cars.

Creating things? VAT on each creation. Spending? Taxes. Selling something? Capital gains. Inventing stuff? More tax. Sole proprietor? Tax tax tax