Is the money raised through Kickstarter seen as income, and therefore, taxable (meaning that 20-30% of the final amount raised is lopped off)?
Similarly, if you raise $25k to make a foobar and spend $20k on materials, you'd only owe taxes on the profit.
I am not an accountant, etc.
Or, to my understanding, even if it goes to a person. Being a sole proprietor does not preclude you from deducting your business expenses.
disclaimer: I am even less of an accountant, etc.