First Property - Sheriff Sale - Investor Pitch

[Harrison Wood]

Hello, my name is Harrison. I am currently 24 years old and I'm planning to buy my first property in the next 25 days at a Sheriff sale if all goes well. I am looking for advice on how I should pitch this idea to an investor which will be my grandfather. Essentially, I need him to pay for the property up front since I do not have the amount of cash needed up front since it is a sheriff sale. I want to pitch him a solid plan where we can both make money and essentially have him as a partner, versus just asking for the money which he would loan me. To sum it all up, I can get the money but instead of just getting the loan from him, I want to make a partnership and prove myself so I can do more than one deal with him. Lastly, he is a very wealthy individual and I feel like it wouldn't be worth his time to dish out the money needed so that's one of the reasons I haven't asked yet. I would also be investing for the long term/rental property. 

Anyways, I'm not the best at describing what's going on in real time through typing so if there are any questions that I can make more clear, please comment and I would love for your input. (I should reply quick)