I don't think it will effect custody if you did move. I live in au, and have done child stuff in my last relationship. Although au believes that children are better off with mother first depending on age and then father or with parents who are not capable, then next stop is extended family if docs are called in.
Mostly you can do what ever you as parents can agree on. There are groups such as relationships Australia who will help mediate agreements or the courts do free mediation. Unless its a huge $ settlement courts don't really care much.. And prefer you do mediated before fronting them.
. Moving might not be your best option, for the relationship, at least under the same roof, you will have more contact and opportunities especially with kids.
I don't have such ties and I'm feeling like its going to be a very tough road to hoe.
M 46 h54 Both married before T 11y Bd 2/14 I must see where ow leads! Ms 18 hs 26