It could be a matter of simply cleaning the rug or perhaps it needs to be replaced. 

Clean and treat damaged wood. 

Cleaning up two units -- will resurface the parking lot and add landscaping to finish off outside.

Then, you also have your continual Capex reserves, i.e. a new roof will still wear out in about 25 years, or a new HVAC system about 15 years.For maintenance, it is always a best guess, and percentage is about all you can use, but similar to Capex, the situation needs assessed: lots of trees, expect 2x per year gutter cleaning.  

Looking back at renters with the higher standard comparatively, they clean up the unit so well, I cannot find fault to keep a bit of their security deposit.

I did a deep dive on the internet and there is lots of information about how it COULD be done but so far I have yet to find someone who has actually done it!

For example (fictitious) - can my future LLC (a) acquire properties (as above), (b) provide consulting services, and (c) offering commercial cleaning?

In my experience going with this pointed approach means you have a broker on your team with intimate knowledge of that asset class & a deep network to boot.

Cleaning up the property, landscaping, staging, and some minor repairs.

If its a house hack I would spend some quality time really getting to know the area(s) you are looking at before getting in too deep.