Basically one only way is to get married and prove hardship for either my child or wife to get a waiver to come back to U.S.... and that process I've heard is very hard

If I do decide to leave the country I would get 10 years ban regardless me coming here EWI without any consent. Is there a difference if I leave the country voluntarily or leaving with a deportation order? I've heard from some that if I leave voluntarily I get penalized less. But I am not too sure about this.