According to Illinois Compiled Statutes (Chapter 750, Families Act 30, Emancipation of Minors Act) a mature minor ordered emancipated shall have the right to enter into valid legal contracts, and shall have such other rights and responsibilities as the court may order. A lease is a form of contract. Check with an Illinois attorney.
Please consider getting domestic violence counseling for yourself so that you don't fall victim again to the type of incidence you described. Here is a link to a program in your area: http://www.safeharborky.org/our-services.htm
Here are two suggestions to get you started on resolving your question:
First many states allow a parent to designate a "stand-by" guardian. Here is a link to Maryland's statute: http://law.justia.com/codes/maryland/2010/estates-and-trusts/title-13/subtitle-9/
Second, you may want to consider giving your mother a special power of attorney rather then relinquishing custody. The special power of attorney should be drafted to give your mother the power to make educational, medical and...
An oral contract is an agreement made with spoken words and may generally be enforced the same as a written agreement. Most any legitimate dispute may be settled in court including disputes between former roommates.
The Federal Trade Commission provides some useful advice regarding your problem. Here is a link to information provided by the FTC regarding work at home schemes: http://www.ftc.gov/bcp/menus/consumer/invest/workhome.shtm You may file a complaint with the FTC here: https://www.ftccomplaintassistant.gov/ The last suggestion is to file a complaint in MS small claims court. [http://www.consumeraffairs.com/consumerism/small_ms.html] Hope this helps.