That's the same no matter what method of payment you use. PayPal charges merchant fees. Most banks charge fees for direct debit. Bitcoin has transaction fees.

That's the same no matter what method of payment you use. PayPal charges merchant fees. Most banks charge fees for direct debit. Bitcoin has transaction fees. Western Union has transaction fees. Even if you only accept cash, checks, and money orders, it will cost you time and fuel to deposit them at your bank. The percentages might differ, but as long as you let someone else facilitate your transactions, there's no way to avoid paying some sort of fee.