Single Solo 401K for Multiple Properties?

[Todd Magin]

First, a very brief snapshot of my plan is in order: Buy and hold multiple small apartment buildings and hold each building in a series LLC. I said it would be brief! :)

Funding for these will need to come mostly from my IRA funds (I may be able to do the first deal outside the IRA)

Can I setup a single SOLO 401K with a master LLC/S-corp, and then have the buildings held in subordinate series LLCs? I hope solo. :) Or do I need to setup a SOLO 401K for each investment?

Of course, I'm early in this process and intend to consult with a RE lawyer (entities) and RE accountant (SOLO 401k setup), but I'd like to know what everyone here has done.