When amnesty or CIR passes, how much will it cost to apply for a green card through an attorney?

A fee is impossible to predict, because we do not know the requirements. There is no law and no program other than DACA. That program disqualified many who arguably deserved relief. It is still possible that the president will no longer take action. President George W. Bush proposed such a plan, but certain members of his political party refused to support his pathway to citizenship. That proposal was never approved by Congress. In addition, some may not qualify. Some may have criminal convictions or other immigration violations that may disqualify them. A person usually must prove continuous physical presence for the period of time required by the president. If there is not enough evidence, then it is best to avoid the process. There are applicants who were denied, because they could not present enough verifiable evidence. Some evidence may not appear believable enough to an examiner to support approval. It is best to schedule an appointment with a competent and experienced immigration attorney if a program is put in place. The attorney should take enough time to review and investigate, so that a reasonable recommendation can be made. A thorough review, usually, not always, comes at a price. You will lose more money if you file through an attorney and the application is denied. An attorney who is not paid for an appointment will be more interested in charging you to do additional work. Good luck.