Should I Invest in Performing Notes?

[Eric Schwake]

Ok so here's my scenario.  Would love some feedback on whether a performing note would be the correct option for me.

I'm in the process of opening an SDIRA. My first investment in that will be a rental property which I'll be buying for cash all in at ~$80k. I'll put about $8k into some low expense ETF's to hopefully earn a little interest but more importantly be usable as an emergency fund for the rental. I will have around $50K left in the SDIRA so this comes to the my question. Should I invest the remaining money into a performing note? Or should I put that $50K into low expense ETF's while looking for another good rental property to purchase at a later date. As a side note I'll still have ~$40K in my Betterment IRA investing in stocks so I'm not putting all my eggs into the real estate basket, just a majority of them :).