Of course we would establish and talk through an operating agreement with an attorney etc.

Do you own all facets of the operation?

So, my question is: What are professional STR managers are doing to keep operational, maintenance, and cleaning issues to a minimum and everything running smoothly? 

Also, you want the insurance so that you can let their lawyers fight the lawsuit, otherwise you'll go broke just defedning your LLC.https://www.biggerpockets.com/...https://www.biggerpockets.com/...Then, there is the extra overhead with operating with a LLC. 

@Michael HutchinsonI’m sure out of state owners or self operators could use this service.

I honestly think it is the perfect platform for most operators until they need to switch to a Buildium or Appfolio type of platform.

The “Core Personal Consumption Expenditures Index,” a key inflation indicator, rose a faster-than-expected 3.1% in April as price pressures built in the rapidly expanding U.S. economy, the Commerce Department reports.

so I don't know if it's really a viable business at its core.

They should provide you with a very clear & thorough breakdown of their businesses operating expenses, though they may not provide it until you've signed an NDA disclosure and made a formal offer. 

There can an operating agreement which will indicate how the income and expenses will be split.