hesitant because a guy wants to protect his business???? they could still give you quality ROI without outing their shit... that's like saying I am willing to do business with you as long as you show me exactly what you are doing so I can cut you lose do it my self and fuck you at your own game since you showed me how!
That's how investment works. No sensible investor is going to put their money into something when they don't know how it makes money and what the risks are.