This is why you pay a cleaning company to clean.

Working directly with sellers is the bulk of the equity capture I need at the buy.Look for tired plexes, carpet and a dumpster in the driveway, yard/moving sale holders, places for rent and to your circle you deal with regularly. 

Bleach with water cleans up a lot.I'd get an assessment of the extent of the issue.   

Should I cash out this amount and replace it with $10k from the LOC or keep the "clean" cash in there?

They cleaned and painted.

Should we take extra measures when having our properties cleaned between guests?

I had a rental that was initially my home and it came with chocolate carpets. 

In a high grade asset the tenant pays last month and a small cleaning fee can be deducted or other small reimbursable costs vs they destroyed the entire interior paint job, left  all there furniture as well and the place needs a deep clean along with not paying last month. 

Now since you are buying the properties and the income stream, you are also assuming the debt.While it may be tempting and easier to just “forgive” the debt and start the tenant off under your management on a clean slate, I would not recommend this.

This included changing over a few HVAC grates that had been broken by wild animals, cleaning out debris and yard waste from the backyard, installing a new bathroom fan, etc.The biggest surprise continues to be the loan that I took - not only did I have to pay for a rehab consultant to oversee the project on behalf of the lender (he cost me $850 on the first inspection, and $375 more PER draw after that.