oh god I get worried whenever folks say they're not paying for things because they're business expenses.
sorry for offtopic, but you're still paying for all of that yourself. all tax deductable means is that you're not paying taxes on nonexistant profits.
so if you buy something for 80 bucks and use it to sell something for 100, you only pay tax for 20 of those 100 because that's actually the taxable profit you made