...When you bought it, you took over the landlord role of the former owner, so you have an inherited tenant that is now your tenant and your relationship is as spelled out in the lease agreement.

You need to consult with your attorney and them draw up an operating agreement that spells out each of your roles, duties and responsibilities as well as consequences for not performing, and how the company is to be dissolved if it ever needs to be.

What they have done with the LLC is pushed the custodian into a background role - simply documenting the IRA's single investment of the LLC, doing annual reporting and acting as gatekeeper for contributions, distributions and plan-to-plan transfers. 

I will keep my eye out and let you know if I hear of anyone that would fit this role.

What are some ways you've divided up roles/responsibilities?

@Michael Dang Honestly, historical cap rates play minimal, if any, role in my underwriting.

I inherited 9 tenants and forgot to require an estoppel from the seller as to the deposits, rent roles, etc. 

Role the dice and change the locks. 

Meanwhile, I am interviewing for the next role.

Looking for advice, part and full time opportunities, and ultimately a way out of the traveling salesman role I have found myself in.