Is the price of the theme one-time or recurring (monthly/yearly)?

The payment is one-time. After you pay the one-time price of the theme, you will never be charged for it. But you can buy extended support after your support expires...

The payment is one-time. After you pay the one-time price of the theme, you will never be charged for it. But you can buy extended support after your support expires after 6 months.