I agree with M Soliman, "Loan Mods" do not exist. It is not so much that the "lenders" don't want to modify, in most cases they CAN NOT. It is likely that you are seeking to work something out with a party that does not even own your loan.
Most "mods" just prolong the inevitable, continue to drain your finances, and waive your rights to any recourse with any of the parties, known and unknown that help put you into this mess.
I would ask the law firm if they are willing to litigate and address the claims that I would be willing to bet exist in your loan. Most Attorneys although very skilled in law, donâ€™t' really understand the depths of what they are dealing with. Don't forget their fees, you could be paying 15k + to still be in the same boat.