I can imagine how gross those units are. Honestly, I am always shocked at how some people live! Most of my current customers are pretty tidy but I do have two that are not. Junk piled up everywhere, you have to move a ton of trash in order to clean, etc. etc. I have one customer who only calls me every couple months - just to clean her two bathrooms. It is obvious she doesnt do much cleaning in between! I like her, and it isnt hard to get the two rooms clean, but I do wonder....and it is a bit gross to clean up the extensive dust, hair, makeuup on counter, etc etc.
When I was a beginner, I accepted any old job i could in order to get experience under my belt. As I have gotten better and a lot more efficient at what I do, I was able to start picking and choosing my customers, plus I figured out the best way to market my services.