Architecting a complex Woocommerce Subscription Solution

Hi! I’m currently setting up a WP/Woocommerce site for a subscription based software as a service ERP system. Among the requirements, I need to have a subscription functionality that requires customers to first buy a monthly base subscription (one of three options) and then add-ons. Customers should be able to change/update/modify the base subscription and add-ons on a monthly basis. From my reading, I believe this is possible with Woocommerce Subscription module, though I have also found “Subscriptio” (no n) from RightPress, but unsure if it will fufill this first requirement.

HERE IS THE REAL CHALLENGE > This ERP system will be offered throughout Latin America and I need to be able to display prices and bill in six different currencies and have all payments deposited into a single account in USD in Panama where we are located. This has been the biggest challenge so far. The one Payment Gateway I have found is 2Checkout, BUT neither Woocommerce Subscription nor Subscriptio have immediate support for that payment gateway.

Any ideas or suggestions are greatly appreciated! Thank you