His whole selling point is teaching people how to generate enough passive income to quit their jobs.

Add AC and you need a good HVAC tech...if they come from the next town, again their availability may be limited and they may charge trip charges.Do you know this town well? 

A written job offer detailing pay.

Just use google maps and you can do a good job counting the number and size of units.  

I called their tech support only to be told they would submit a ticket.

However, I live close-by (30 minute drive), recently retired from my day-job, and if the loan is not too large, I might be willing to do a deal just to learn a bit more about another side of RE.  

You are working a demanding corporate job but also want to build rentals on the side.

You could start by checking out Upwork or Fiverr—those platforms are great for beginners because you can create a profile and bid on jobs.

Make sure the previous property management company did their job and communicated a change in management prior to you taking over--along with your contact information.If they have no done this, they should so the tenant doesn't feel like a scam may be going on.Just make sure they're away of where rent payments need to go and who they can contact in the future. 

I am disappointed in their results due to poor NOI and I believe they didn't do a decent job in due diligence prior to purchase.