Providing down payment, received 15% on loan and 10% on profit

[Karen Postel]

I  am new this RE investing and so I have a question about private lending.  I know someone that flip houses in southern CA.  They just been told that a property they bided on & lost out on, fell out of escrow.  But unfortunately their cash is all tied up.  They asked me for a down payment of 60k.  For the 60k I would get 15% on my money and 10% on any profit.  They are in escrow for 450, with a rehab of 32k, sellers cost at 28k, 4 months mortgage pymt of 20K.  They expect to sell around 560k.  Is this a good deal or not?  I need someone to help me out on this......