Impossible to say without ALL the facts, and ALL the background (how long ago was the judgment?) The more evidence of fraud or concealment you can provide, the more likely it is that you may be successful, so the motion should include ALL the evidence you have. You need to review ALL the facts with an EXPERIENCED family law attorney; a successful motion to set aside a judgment is NOT going to be a "do it yourself" project,
Any substantial facts is enough to file but it is impossible to predict outcomes. It very subjective as there is no jury and it is a judge that will determine the facts and the law.
This is not a comprehensive answer and it is impossible to provide a meaningful response without a consultation.
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