Hey Gabe,
Thanks for your interest in our plugins! We don’t have any special sales department or special handling of payments/invoicing/etc. for customers, and strive to provide the same services equally to all customers. To explore options for buying a plugin, the plugin’s product page itself on this site contains almost all of the relevant information for price, payments, subscription terms, etc.
For example, check out the product page for Events Calendar Pro → https://theeventscalendar.com/product/wordpress-events-calendar-pro/
All the license options are listed there, and are the only license options available.
In terms of “statement of work”, our plugins are just products; they are not client deliverables and do not come with hiring us or anyone else for development work or anything like that. It’s just a yearly subscription for support and updates, like a magazine subscription.
When it comes to invoices, if you purchase a license you can generate an invoice at any time for your purchase of it in the “My Account” page on this site. Here’s an article in our Knowledgebase that details this process → https://theeventscalendar.com/knowledgebase/order-invoices/
Does all of this information help? Let me know! If not, let me know what specific things I can do a better job of elaborating on 🙂
Cheers,
George