Hi Andrew,
Authorize.net requires that your trial period (Day or Month) be the same as your subscription period. You can not have a "yearly" recurring subscription and offer a trial subscription based on "days". There is a solution if we do a small customization to the module. Currently in the module settings there is checkbox titled "Show Recurring Billing Start Date" that when checked allows the user to choose the start day that their recurring billing occurs. We could customize the module and program a variation on the "Show Recurring Billing Start Date" and add a new settings field that allows the (admin) to configure the number of days out to start the paid recurring ARB transaction at Authorize.Net. In your case you would enter 60 in this new field and the module would allow the user to checkout and add them to a role essentially giving them a 60 day trial period before starting the recurring billing on their credit card. If you are interested in a quote for this customization please send an email to sales@smith-consulting.com.
Thanks,
Scott