Those are good links that talk about valuation.

I think you are trying to make a link between the par value of the stock and the valuation of the business. There really is no link.

If you establish the corporation and are the only shareholder then you own 100% of the business. It doesn't matter how much money you have invested in the business. In fact, you don't actually have to put any money into the business.

This discussion of valuation only really matters when you want to bring in outside investors. and then, it still doesn't matter what the par value of the stock is, and it really doesn't matter how much you capital you have invested in the business either. What matters at that point is how much value you can convince an investor that the business is worth.