His mom is co-signing the lease for him (but living in a different state and paying for his rent) and said he has mental disorder.

Mentally, I cannot ask for monthly rent when I would not live there myself. 

After 4 weeks of exhausting negotiations, we have finally come to an agreement to purchase a 3-unit building!

In beginning of 2018, with an ambition, no knowledge, and a gun-ho mentality.

Thanks to youtube videos that glorify the burn em' and churn em' mentality you are getting people who will rush through the process, hike up their fee, and look to settle for the rest of the year since they made their salary. 

I am just trying to get into the mentality of the the investors that I am working for and info or general concepts help.

I personally have, and continue to thrive off of repeat investors but I am always looking to grow my network of relationships.So for all of my wholesalers and investors out there~Legitimate Wholesalers- have any of you experienced this dilemma and what has your solution been to establish legitimacy in a time where our profession is being too loosely equated to the "get rich quick" mentality rather thanInvestors-What are some of the pain points that you have run into with wholesalers?

I will definitely file that in my mental Rolodex.

Recipient holders never believe me and eventually you get exhausted having the conversation.  

Some people/ entrepreneurs will work side gigs for additional income after they have exhausted all available, and profitable hours that can be devoted to their primary gig.