There is some variation among the different States that offer the Series LLC, but you will likely only being paying for a single registered agent and single annual State compliance (if applicable).

The energy savings must be certified by a qualified professional stating that the system meets or exceeds the applicable savings targets.

At that time there were essentially no rules in many of the smaller town and cities, many of which have since implemented strict or limited permit application and approval processes. 

---So, insist on them providing the rental application and supporting docs for your review.

Check your policies to see what coverage would be applicable (flood from the flood policy, wind damage from the property policy or wind pool policy, etc.).  

Do one task at a time in each app so you can compare apples to apples.Load a property with pictures and details.Market that property.See what your marketing looks like from the public's perspective.Submit a fake application to see how easy the process is.

I have no SSN or greencard / working Visa.

The only trick is application, learning to apply all that you are already a master of, into this. 

In our experience, the higher calibre tenants prefer a longer term (they want to settle down and find a Home); though when the housing market heated up we also had a lot of great applicants who wanted the flexibility to leave if they were able to BUY their own home (a bit more work for you, but not awful if the tenants are consistently good).Congrats on the purchase!

If we decide on "yes," we would definitely require the additional adult occupant to submit an application.