Do Not Make Hard Tooling

If you have designed a product and want to take it to market DO NOT invest in hard tooling especially if it is an injection molded part.
There are options where prototyping can present a "finished" looking part that can be used for presenting to potential customers.
From these prototypes and the files that create them you can get costs to produce the product and thereby developing a selling price.
Prototyping will also allow you to go to trade shows to show off your product to attract potential customers.
Mock-ups of packaging is also a low cost alternative to showing how the product would look on the retail shelf.
The bottom line here is to avoid spending $100's of thousands of dollars on a product line that potentially no one wants.
I recently met someone who did that and he and his wife are still looking for their first customer.
Do not get yourself into this financial hole.
Also the time to show your product to customers is faster/better/cheaper way to go.