A turn-key provider would be a company that can handle everything from sending you deals that fit what you're looking for, assist in getting you pre-approved for a loan, rehab (if needed), management, and maintenance. 

You also do not want to be too cheap and leave money on the table.If you do all of that you will be well on your way to being successful.  

If there is a mortgage on your primary residence and you are trying to deed your primary residence property to an LLC, you will need to check with your mortgage company if they allow it.

Quote from @Adam Sieg: I’ve used all but the only company I continue to buy through is R2R.

Huntsville is a challenging market given the price points but I've had clients find good success in the suburbs. 

My company is actively scaling in the multifamily space, and partnerships are at the core of what we do.

This will be some management company, right?

Quote from @Marlena Hawkins: Does anyone know what insurance (liability, E&O etc.) is required for Property Management companies in DC and Maryland? 

Yeah, my company does.

I would try to subscribe to Angies List to determine a suitable mortgage company.