On top of that, there are regulatory agencies that each and EVERY financial institution must answer to, and EVERY financial institution is audited to ensure that they manage foreclosures in a uniform and consistent, legal manner.

Several of these folks are deep into the mobile home world.  

Also, the scary part is that she has collection of almost 6k pending from collection agencies!

The short of it is that you are best served to find a reputable insurance agency that has experience working with investors. 

They are a government agency.

You could file a complaint, but before you do consider a few things:(Note - my knowledge is based on the rules in AZ but most states are pretty similar)1) Investors are not eligible for payouts from the Recovery Fund, so filing a complaint to the state licensing agency will get you precisely $0 unless you plan to use this property as your primary residence. 2) Based on the original post, the only strike against him is that he went over schedule.

I will say cut your loses and look for another project and next time you get a signed contract, make sure you have your own agent, don't do dual agency, as the listing agent has allegiance to the seller, not to you, and after delivering earnest money, make sure that property is removed from the market as active and that the contract is sent to the bank immediately.  

Is another option working with a collection agency? 

For only mobile numbers and maybe email addresses?

I have had owners work on doing those types of deals with agencies before where they post it on the MLS for you and it works out really well!