I’d love to hear about the crime rates or any other issues (which we cannot guess from the online stats), and how easy or hard it is to find reliable tenants and property management companies.

If the insurance isn't done properly, it's on the edge of impossible to cash the check because it's made out to the lender, my company, and the seller(s). 

They must be very low odds because insurance companies are in the business of making money, not paying out maximums.

@Rami Refaeli I am on the Fort Worth side of the metroplex but the company I work for is based in North Dallas.

It may sound nice to pay a 6% management fee but the extra fees can add up to be more than the other company that charges 10% with no additional fees.

@Steve Babiak, unless he registered with Pennsylvania as a contractor, he would not show up on there, the company as the OP stated is from NJ where he would be registered. he should be registered in PA if he is doing work there, so i agree, he should have shown up on those sites, i am a contractor in NJ but do not do work in PA, not even my own properties, so i do not show up on those sites.

For example, could I use my SDIRA to operate a management company that charges my holding LLCs a management fee?

This company might be a good option one day, but not now. 

What if it is 90% occupied with employees of one company.   

Wasn't for me.I'm not affiliated with the company, although their founder @Brandon Hall is a colleague and a friend of mine.