We initially got into investing after speaking to a co-worker who was approaching retirement and he told me how he owned multiple properties and how it would supplement his retirement.

If you need supplemental retirement income - take it.

The stuff he learned from that course was so rudimentary and generic that he could've gotten in serious trouble if he tried to wholesale in Pennsylvania based on that lecture.  

If the mailbox had a flap at the start of a tenancy, and it disappeared, under my lease, that would be charged to the tenant (potentially the same for the broken closet door.. but the description is too generic to understand if it wore out or if it was abused).

Your strategy sounds great - I am a huge believer in holding on to rentals to supplement your retirement. 

I would agree with @Patricia Steiner that sphere of influence is definitely a more effective way to go for your main strategy, and maybe you can add in cold calling to supplement it. 

Just to add a little, I think the audit can be a nice supplement to your own due diligence process, especially for new note investors.

Between the two not quite enough units to make a real business out of but could be if I supplemented those spaces with portable units.

Thank you.If your PM put just a generic lockbox on there, they're not tracking when the property is accessed. 

I’m also considering furnishedfinders for MTR, and I like the idea of supplementing with STR during the in between.