Tax Liability for Lending Money to Family Member

[csci1000]

I want to lend let's say $200,000 to my Uncle to get him purchase this business he wants. If I do that and my Uncle pays me back $4000 each month for 50 months, completely pay off $200,000 he borrowed, is there any tax liability issues arise for me by getting this $4000 every month from him? As it's family member, I am not charging any interest at all - and yes that's fact that that's how it's going to be indeed ($0 interest) if there are any interest issues.
Please advice if we can do something like described above?
Thank you

[Mr. Knowitall]

Not from what you've told us so far. It's not income.