i wish you luck in working things out
I, too, am very sorry that you lost your home.
I suggest you contact your State's Attorney General's Office to report the loan modification company scam.
I dougt you will be able to find a Seller to agree to a land contract for a 3-5 yr term. But if you do, please hire an attorney who handles residential real estate matters to represent you. Some land contract offers are scams too.
Your best bet may be to rent an apartment or home until you can repair your credit.
I am sorry you lost your home. I would highly recommend you to contact a foreclosure attorney for legal advise on this matter. There can be too many details that you haven't disclosed here to give any adive..Also, There are so many different laws regarding short sales, bank owned and foreclosure which change too often.
Good luck to you.