Subsequently, you're shooting yourself in the foot by proclaiming to be (at least that's what most people would think if they read 'realty')

As long as you complete the program in 2 years and there is no slide of the starting salary, it is guaranteed.It is not passive, but I did not see that as a criteria. 

If it is cheaper to hold a unit vacant until the recovery, than lower rents and subsequently affect rent prices of all units, they will do that.

Otherwise I let most of it slide. 

I don't know what your situation is, but if this is a 3 plex for a bit of personal side income, I would likely let it slide.

Online learning is not for everyone and it consist primarily of reading slides. 

(My reply was to an earlier post I didn't see a subsequent on wthat WAS very good.)No.

I understand that this can vary a lot depending on the age of the house, type of neighborhood (and subsequently the quality of tenant), etc. 

If you are talking Single Family homes in SE Michigan, not Detroit with a value of 50K to 300K with replacement cost being $110/sq ft,  built post-WWII,600-1100/yr. thats a sliding scale based size, value.Of course that number reduces with volume.

The surge in demand for building supplies and the subsequent price increases along with the associated dearth of availability for the skilled trades could lead to further deferral of needed maintenance.... and more.There are just too many variables to consider.