If you feel like you are scraping by, you might need to downsize the apartment, go out less, eat out less, cook more, etc.

If you don’t cook, would  you spend money learning how to boil a pot of water on a stove?

It is typically caused by excess humidity (showering or cooking) and can be resolved by teaching the tenant to use ventilation fans and airing out the home once a week for 10-15 minutes.

Law enforcement is now targeting third parties involved in “cooking the books” that “force by fraud” qualify clients for Covid-19 relief.

For instance, if the neighboring unit has a shut-in chain-smoker, or the house has railroad tracks behind it, it is definitely better to let a lead know and lose them than to not disclose, upset them and lose them (after they leave a nasty review).I'd agree with Jonathan that even late complaints need to be taken seriously, and barring some obvious malfeasance, I would just take the word of the resident and fix the issue.

You find the house completely trashed with missing appliances and cabinets, tenants were cooking meth, windows broken, etc. 6-8 months of unpaid rent, unpaid utilities, thousands to empty the abandoned property and trash, $50,000 to completely renovate the property and make it rentable again, plus all the time, energy, and stress along the way.I would actually argue this is pretty common and not even the worst-case scenario. 

(I am usually lazy about courses and pick + choose my engagement) This feels very different from most things I have "tried" to work on in life (except for when I turned to RSD and Owen Cook a out 13 years ago to improve my dating life which resulted in finding/ attracting and marrying the girl of my dreams!

Law enforcement is now targeting third parties involved in “cooking the books” that “force by fraud” qualify clients for Covid-19 relief.

Have to figure out what to cook. 

Then go home and bake your own and hope you do it right.You can go buy a cook book (like a course) and follow the instructions, which is great, but you might still need some pointers . . .