Commercial loans are not as widely available as conventional residential loans, but there are many banks that do them. 

How wide is your property's trade area?

Generally $1,000-$1,500 for escrow and title plus any fees that your lender charges, which can vary widely.

It’s been awhile but I am going back in eyes wide open and doing my necessary due diligence.

I do not know where you get your numbers but prop 10 recently got whooped on a state level and that proposition was not to institute rent control but simply to allow municipalities to institute rent control where it is now banned on the state level (biggest aspect is no rent control on units built after 1995 and exempts SFR and condos from rent control state wide). 

There are a wide variety of possible fees and charges that can be included in the closing costs. 

The trailers are all single-wide and older, but most of the tenants are long term and I think they'd be open to a rent-to-own kind of deal (I don't want to manage the trailers themselves, just the park).My big issue is that I am going down there on work visa and won't be able to get a green card for about 2 years.

I have much more than that from 2 decades of experience.I currently have 3 firms.1) An IT Software firm that develops Software for Enterprise Wide Corporations2) A Property Management firm that takes care of all my existing properties3) A new Brokerage FirmI have a NY Broker friend of mine who can walk me through all the Process, but I want to first do my own research since he is a bit busy.So going the route of working for another Brokerage Firm won't be an option I would be considering.At worse, I will hire an Associate Broker or an Office Managing Broker to Manage and set up the appropriate Business Processes.Then I'll have my Software company come in and develop all the necessary IT (Websites, MLS Access, etc.) projects that a full blown Brokerage need these days.

A Nation Wide Insurance Company wants to lease one of the units.

I'll focus on an area and google maps satellite view going area by area looking for the tell tale sign of the smaller single wide shaped homes in a row or column.