A few queries for better clarity.
First from your Present Employment perspective:
1] Are you still employed with the company to which this company is supplying parts?
2] If Yes, does your company know about your plans--that you have been offered to start the Unit?
3] If No, do you intend informing your present company--if not now, then later? How do YOU think it will be taken?
From the Opportunity of starting the Unit perspective:
1] Will this Company be giving you the jobs--of manufacturing sheet metal stampings? If Yes, any specific timeframes--meaning until when--AND in what quantums--meaning sufficient for monthly work load?
2] Will your present company's work also be routed to your new business? If Yes, then there COULD be a few issues.
3] From where has this Company been getting their jobs executed so far?
4] What's in it FOR THEM by helping you to start this Unit? Obviously, there's NOTHING called 'free lunch' in life.
5] Will you be free to take-up other jobs--NOT linked to this Company who are helping you?
6] I wouldn't touch-upon the Financials--though they are quite important--at this stage.
I suggest you to give as many details as possible [without revealing the names, etc]--that will enable the members to give the most accurate & realistic suggestions to you.
All the Best.
26th March 2014 From India, Hyderabad