Dear Friend,
First of all, wish you good luck for your venture.
From the information given above, I believe that all the funds that your father shall receive in India would be white and no shadow dealings. However, in either case, you have two options.
First, you can open an account with ICICIBank, either in India or in the US and use it for unlimited transfers. In india, your father can do it. If you want to do it in the US, they give U S Currency checking account, which they call Global Indian Account http://www.icicibankusa.com/personal_banking/GIA.html
You can go for this option. As it will incur minimal cost of transactions.
Alternatively, if it is an one time affair, you can use moneytransrer services like western union, but need to check for the limits of sending in one transaction from your city in india as it differs.
However, Banking route as mentioned above should be more preferred overall.
I hope the above helps,
Regards
Financial Advisor
Technical Analyst in Financial Markets -- Experience of more than 10 years in consulting