Unlike child support, spousal support is often very difficult (if not impossible) to modify after the divorce is final, so getting it right the first time is a must!
"They will most likely take your case pro-bono." ___________________________________________________
IMO, you will have a hard time finding a family law attorney who will work for free, However, they could petition the court to have the spouse pay for the attorney's fees, which is very common and often done.