@Jason Merchey as @Michael Swan said, you want an operator that will not only protect your money like a pit bull, but put their own money on the line as well. Having skin in the game will make sure the sponsor is honest and has done the due diligence on the project to ensure he will protect his own money as well. And as @J Scott said, it's up to you to ask yourself the right questions about the due diligence that was done, and and risk analysis if things change.
I also look at a worst-case scenario of a property continuing to perform as it is, in which case your money should be worth at least that, albeit discounted.
Lastly, depending on the projected return, you should only be prepared to put up money that you're willing to lose based on the risk / return.
My company has not found the deal worth syndicating in two years, as we manage our own properties and have not found numbers in the area that we could make work based on where we are at in the market cycle. As such, we have shifted to self storage as what we believe is a hedge against the next market downturn.
Good luck!