A: You can absolutely start with just one code. With one purchased code, you'll get a premium model upload (up to 300 MB) along with the option to make that model either unlisted or private. This setup is designed so that even non-tech marketing professionals can offer 3D services to real estate builders and developers without needing to stack multiple codes immediately. As your needs grow, you can add more codes for additional storage and capacity.

Q2:
Here’s what the terms mean:

Max. Model Size:

For a premium (purchased) model, you can upload a file up to 300 MB.
For free models, the file size limit is 100 MB.
Unlisted Models:

Each purchased code gives you one model slot that can be set as unlisted. This means it won't appear in public listings but can be shared via a direct link.
Private Models:

Similarly, each purchased code also includes one private model slot, which is accessible only to those you explicitly share it with.
Public Models:

The free upload option for public models has a 100 MB limit. For larger models (up to 300 MB) or additional privacy settings, you would need a premium code.
I hope this helps clarify how it all works. Let me know if you have any other questions!