It all depends on risk tolerance.

We have a 70 lb rescue dog who is the sweetest best behaved dog we've ever encountered that hasn't damaged anything of ours in 4 years of owning him and tolerates the antics of a 2 year toddler with more patience than I have. 

Will depend on several factors like the type of property, type of tenants, your risk tolerance, other assets you own, your estate planning, laws where the property is located, etc.Any lawsuits would be limited to the assets of the LLC and not your personal assets (assuming you run the LLC appropriately and the corporate veil is not pierced).

It all depends on what you want to do, what your risk tolerance is, and what yields are desired.

Some things I would keep in mind as you move forward are your risk tolerance, the amount of effort/time you'd like to invest, and your financial picture. 

I like your goals to amass a portfolio but as mentioned before, to truly make After-tax cash flow of $10,000 a month would require one-few million dollars and a carefully balanced capital/equity position to reap the benefits of leverage and risk tolerance, especially if you are using your SDIRA.

Choosing between the two classes is a matter of what is your risk tolerance and where do you think the market is going. 

And not projecting your own risk tolerances and preferences onto what you are writing on behalf of a client can be hard.

This is based on my specific risk tolerance of ROI vs PIA.  

If you can tolerate a 1/1, I think you'll definitely find a duplex of 1/1's in your price range that will come pretty danged close to your cashflow goals.