What kind of issues might I run into?

Her credit score was alright but she a few past credit issues which were explained to me but were still concerning.

Are there issues with existing neighbors opposing STR?

What I find is that some REs don't see or observe details such as a creepy alley next to the house or a sunken garage that may lead to future flooding issues, for instance. 2.)

CPA issues 1099 also for a small fee. 

In addition, when a property is passed from you, to S-Corp to LLC, there is no paper trail associating you with any homes if, for any reason, the LLC is sued, it can not be traced back to you personally. 

I personally probably wouldn’t let them do this just because it’s a liability thing but others may have no issue with it.Personally I don’t want anything that’s mine in the unit or in the property if possible

Most are fine with that, but a few will have problems with it and claim there are legal issues, etc..

I do wonder what the statue of limitations would be on this issue.

The ones I've found for sell have utility liens and backed taxes on them, so I'm wondering if these properties would be a great investment after paying those liens off or if there could be hidden issues that would pop up and cost me more in the long run.