Thank you for sharing that. To answer your questions:
Does it have scalability?
Yes, n8n is scalable. We have documented the process of how to scale your n8n instance. You can find more information here: Scaling n8n | Docs
How can I monitor possible errors in the process?
You can set up logging in n8n to monitor the errors: Logging in n8n | Docs
For each workflow, you can also create error workflows using the Error Trigger node.
Is there any way to monitor performance?
I don’t have an answer for this, if you can share more information, I might be able to provide you with a definite answer.
Are there support options for private deployments?
What kind of support are you asking for? You can always ask questions on the community forum
If you haven’t I would suggest you also take a look at our license. Here’s the FAQ around that: FAQ | Docs