Offer your thoughts or opinion on the input financial query or topic using your financial background.

Is this investment opportunity problematic?
As an investment opportunity: NO. As a friendly assist with money you don't mind ever getting back, legal depending on amount. A few years back I was in the housing market myself and researching interest rates and mortgages.  For one property I was very interested in, I would need about $4K extra in liquid cash to complete the down-payment.  A pair of options I saw were a "combo loan" 15yr 4% interest for the house, 1yr 8% interest for the $4K.  Alternately, the "bank of mom and dad" could offer the 4K loan for a much lower rate. The giftable limit where reporting is not required was $12,000 at the time I did the review.  IRS requires personal loans to be counted as having interest at the commercial rate.  Thus an interest free loan of $10K with commercial interest rate of 1% (for easy math) would be counted as a gift of $10,100 for that calendar year. Disclaimer: Ultimately, I did not use this approach and did not have it subjected to a legal review.