I know they had unauthorized occupant issue with their previous landlord so I have emphasized this part with them when we signed the lease.What I can do now?

I can't emphasize enough with Sub2 deals: Disclose disclose disclose.

But the no money part of wholesaling tends to get over emphasized and hyped.

No one ever emphasizes that.

He emphasized that they were motivated sellers, which opened doors I didn't know were available.

This strongly emphasizes goal setting, and measuring net worth, and I have found that habit to be unbelievably helpful. 

He consistently emphasizes the importance of stretching yourself and growing, despite being uncomfortable.Another one was "If you're short on creativity, it's only because you aren't committed enough."

That said, this emphasizes the importance of solid cash reserves to weather the storm.

Tailor how stern you are and how much you emphasize the potential eviction with how likely you believe tenant is to be cooperative.

I emphasize this education because getting it wrong can ruin the lives of syndicators if not their investors.Nothing wrong with being skeptical and taking the time to sort out what is going on before committing to anything.Hope this helps!