hey @blackTshirt, sorry if I’m entering in late, but thought about share nevertheless,
1. As you might be aware, SDN is for you get into a partnership with Oracle NS, and in that account, you can then add unlimited users for dev purposes.
2. You can build an integration with NetSuite via SuiteTalk API or SuiteScript which can be listed on NS App Store - which costs $3000
3. You would get a Partner Account which will be useful troubleshooting and customer support (no support if you are not a partner)
4. You can build a native integration (say Salesforce to NetSuite) or build custom apps via SuiteScript which can be listed in NS AppStore
Hope this helps