I need helping making an investment prospectus for my uncle

[Vin Yan]

Location: San Jose, CA

Property: Multi-unit rental complex

So the back story is that my uncle who wants to become a real developer, but doesn't know much English has tasked me to create an investor prospectus for him. I took some real estate finance courses and I have an interest in becoming a developer myself, so I decided to help him out. The only problem is that I never made an investment prospectus before! Can someone guide me some tutorials or books that can help me create one? What are some pointers or tips that I should keep in mind when making one? I know there is a finance component pro-forma to it and was wondering the kind of required details/information I need to build a substantial one. 

Any information on where to start and some good pointers is greatly appreciated!