Over the 3 yrs the son never stepped into an landlord role ever.

I really want to make sure I do this the right way since I'll be working with family.How have you guys handled similar situations and what boundaries, expectations and roles should be specified?

Now there is something called due on sale clause and this can be exercised if title is changed out of your name. 

@Hugh TrotmanYou might try this exercise - but I warn you, it's exhausting.Your goal is to be resourceful and stretch, not yourself, but your network.What can you get your network to do for you?

Then I found a specific niche / role / talent that I liked and felt I could get excellent at that would contribute to my partners success, ultimately helping my success.  

But finding GOOD lease option buyers to assign to is a much more difficult task, because the reality is that 70% of people who call me on my ads are not a good fit, and likely wouldn't be able to actually exercise their "first right of purchase" on the home after I assign to them before the expiration date.

He keeps the signed deed in a vault in his office until the option is exercised, then he records it with the clerk.

I need every role that will be played in the game so not just agents or brokers.Thanks,Carlo

At minimum the tenant needs to be instructed that they must exercise better hygiene, and I would put this in writing in case you have to sue in small claims for damages.

More details please.What would be your roles in the partnership?