I am a Non-Resident Indian (NRI) and want to send approx $10,000 as a loan to my father's account in India as a contribution for a new home purchase. How do I set this up as a loan so if he wants to return this money to me I can get it in $$ without any tax implications here in the US when I get it back?
You do not need to set this up as a loan. Try finding an Indian student. He is eligible to get cash (using a travel card, may be) from India tax-free. As long as it doesn't exceed the i-20 amount, he will not have any problems. Since, $10,000 is very small amount, the student shouldn't be having any problem.