What are good terms for an investor?

[Eric Geiger]

Looking to buy a 4 bedroom single family home where my college bound son would live. Grandpa is willing to put up the down payment.

What terms/agreement should I make with him? I want to keep it businesslike and fair so he never feels like I’m taking advantage.

I want to be the sole owner to avoid any pitfalls of a partnership so I can sell or more likely keep and continue renting out after my son graduates.