If you were not selling the timeshare itself, but only access to the timeshare, the income reported to you on Form 1099-K could be considered Other Taxable Income, possibly Hobby Income, as you posted above.
In this case, you may report expenses only to the extent of your other/hobby income. Since you're not selling a product, you would not have Cost of Goods Sold. Other expenses may be included, although you may not report a taxable loss. The net income would appear on Form 1040 Line 8.
@bkgrant10
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