Investor Wants My Help

[Inahya Browne]

Good morning all! I recently had an investor contact me and asked if I can work with him, he found my business card on a home (I'm a real estate agent in the Brooklyn area) I think it's a great opportunity and I definitely won't mind working with him but how do I make sure he will pay me for my services? Should I make him sign an NDA? If not an NDA what type of agreement should we have and how do I bring that up? Please help, I want to get back to him by tonight. Thanks!