You'd certainly want to have an umbrella policy in place, in case your business insurance policy doesn't cover everything.- You mentioned mobile bathrooms (hopefully not port-a-johns). 

Rent covers a lot of different expenses that new LL's don't see going in, then try to recoup from tenants. 

Is the home owners insurance covering the cost?  

Have you seen pictures of the property since that last tenant left and now that it's vacant? 

*HOAs usually cover lawn care, sprinklers, lawn watering, siding and exterior care, insurance, and more                *This covers most of the exterior line items that you would otherwise have to address in a single family home.

However, on paper you have to depreciate it based on the 27.5 years, so your metric still looks good, but you took money out of your pocket to cover the cost.In my opinion, the only 2 "real" metrics, since are not easily manipulated are: gross rent multiplier at the time of acquisition and cashflow including principal pay down.  

Will assigning my LLC as landlord limit what these policies will cover me for? 

However, you would need to make sure that the rental rate you could demand would cover the new loan payment plus other expenses while still cash flowing.

In my opinion, anyone that tells you that any one of them is superior in all ways to the others, is not giving you the complete picture.

There also nothing that says you can't take an extra class to help cover areas your profession doesnt cover.