Do your SMLLC as owner of properties, and your PM LLC file taxes? Or they are disregarded entity? I assume your Realty Trust file taxes separately?
Even assuming the individual owner and SMLLC are not separate, I think PM LLC could be a separate entity. If you can hand the PM task to ACME Property Managment Co owned by a complete different person, why can't you hand PM task to your own PM LLC, which I assume is independent entity?
I think your understanding of your accountant is not complete. I have no answer for you, just questions for your accoutant.