This means you don't need the additional expense and administration of an LLC to have checkbook control.

Were starting Virtual assistance for real estate professionals Providing the administrative "brains" for a successful business If you're a contractor investor developer banker etc....

Were starting Virtual assistance for real estate professionals Providing the administrative "brains" for a successful business If you're a contractor investor developer banker etc....

This is the majority of the bookkeeping  -banks love it and you can do a P&L per class/property  Administration/overhead expenses can be prorated based on total income or time.

California LLC's are a nightmare administratively and cost $800/year to the state.If you work with good counsel, you should have no significant risk of prohibited transactions, and the risk is exactly the same whether you write the checks or have a 3rd party custodian do so on behalf of your IRA. 

Compared to an IRA, Solo 401k contribution limits are roughly ten times higher.There is no custodial requirement for the 401k.You don't need the additional expense and administration of an LLC to have checkbook control.There is a built in-Roth component whereas IRAs are either traditional or Roth, not both.A spouse can also participate in the same Solo 401k plan.The Solo 401k has additional tax benefits over an IRA when investing into real estate using leverage.You can borrow from a 401k, but not an IRABoth C-Corps and LLCs can adopt a Solo 401k.

Less administrative and legal levels can make returns higher. 

@Nasson RaymondI cannot speak directly to the services of Advanta, and must disclose that I am a competitor offering a different kind of service in the self-directed plan space.Two key things come to mind:1) Advanta is a 3rd party administrator for IRA accounts. 

You can certainly borrow money from your 401(k) in this fashion....if your 401(k) would allow it (your plan administrator or the plan "terms and conditions" would be able to tell you). 

They can generally recommend a TPA or custodian that they are comfortable working with.A TPA (Third Party Administrator) will provide you and/or your investors with a self-directed IRA account, handle the flow of funds, and file reports as required with the IRS to maintain the tax-advantaged status of the IRA.