I search the property on the State department of assessments and taxation to see if the owner's mailing address is the address of the property.

If your rent property less than 6 months at a time (I believe this figure is right) then there are some county and state specific taxation that you will have to deal with.  

I currently have 3 free-and-clear rental properties in a single-member OH LLC (I live in CA).  Since that LLC is a disregarded entity for tax purposes, I use Sched E on my personal return to account for the OH rentals...

The primary disadvantage of a "C" corporation is double taxation.

I largely just want to avoid the logistical headache of operating a second LLC and I really don't want to face double taxation.

You will have to pay the early distribution penalty if your are under 59 1/2 years old, the entire account will be subject to taxation and you will not be able to restore it.

Steven Hamilton II is always right on the taxation rules.

Any gain on the sale is ordinary income, subject to tax at your current marginal rate and self employment tax (SET).

This is a re-post, but if you haven't seen it, I hope it helps: As it relates to asset protection strategies, think of the work you do with a legal adviser who, upon considering factors such as net worth, estate planning issues and taxation will offer advice regarding entity and ownership issues.

The loans would be from non-retirement funds for non-owner-occupied properties.Normally, income from such loans would appear as interest income on one's personal tax return, but, especially with the Affordable Care Act, there might be tax advantages to forming a one-person C-Corp and drawing a salary, despite factors such as payroll taxes, the overhead from reporting and tax filing requirements, and double taxation when profits are distributed.Interest income isn't compensation to the IRS, so if one only has interest income, one can't contribute to a 401k or IRA.