More Flexibility to Re-Open rules on Requester Reply

I'd like to have requester replies automatically reopen a ticket for a select period of time, but if the ticket is old enough start to open a new ticket. I understand this is currently available in Self-Service Portal Settings:

When the requester replies through E-mail / Portal to the closed requests. Perform the following:

Reopen the same request within days from closed time. Else, create as a new request.

However I only get to choose up from 1-10 days. We're looking at a time period closer to 30-60 days for the type of requests we handle. Is there any ability to manually override those options to increase the time frame?

Or is there an ability to automatically move a Resolved Ticket to Closed status through some form of business rule? If so, then we could start to move tickets to "Resolved" rather than closed, and have them automatically move to closed after 30-60 days.