Each property ends up in its own LLC, but its much easier to administrate, and we only have to file a single tax return as they all flow through to one tax return.  

I'm not sure who the administrator is for your 401K, but many of them allow multiple loans on the account (on the money you put in, not your employers match).

I am soon to graduate from Cal State University, Fullerton with a Business Administration Degree with an emphasis in Real Estate Finance.

For the following reasons:Significantly higher contributions limit (up to $59,000 for 2015)Tax-free investing using Roth sub-account of the Solo 401kAccess funds in your 401k tax-free and penalties-free before you retire via participant loan featureLeveraged real estate exempt from UDFI taxesTruly self-directed Solo 401k is very cost effective - no transaction or asset based fees that you would pay to the custodian with an IRACheckbook control, you don't have to go through third-party administrator or custodian to make investments or transactions You can read details on one of my blog posts at the following link:https://www.biggerpockets.com/blogs/2810/blog_post...Hope this helps.

You might also want to talk to a Third Party Administrator about setting up a 401k plan for the company.  

Eldin, I started with a template (and other documents) from the small business administration (SBA).

If a bankruptcy were to occur, not only will the legal structure  of the investment survive, but they have also specified a new administrator in advance.

  #2, the "administrative search warrant" actually sounds unconstitutional...can they even do such a thing?

Two weeks later the estate administrator accepted.  

So, the IRA can use leverage and will get a higher cash-on-cash return as a result, but, there is administrative complexity and minimal tax cost associated with doing so.