Buy one month Pro?

In maybe 14 years, this is the first time I need to move a Staging Site to live. Always used it to learn, then make change to the Live site. But now have to move after a literal rebuild.

I ONLY need to do this once! Can I buy a month of PRO??

And does it matter that live is WP 4.5 and Staging WP 6.4?

Thanks!

~Bob