unfortunately, u can't avoid having to either go back for 2 years or obtaining a waiver of HRR. if married to a US citizen, u can apply for a hardship waiver though it is hard to get one. check with a lawyer to see if u r eligible.
regarding moonlighting on a J1- ecfmg states that "u may receive compensation for work that is part of the designated training program." one might choose to read between the lines.