I was able to buy my XW out of the house by subtracting her equity (50% of shared equity) from the amount she owed me from her 401k.
I admit I may have it backwards, but I don't think so....
I think this is the right way to go, if possible, Holding. You have after tax money, and she has before tax money. Say you both got $50K out of the split; you truly have $25K, but she's only going to get 19K after taxes are paid when she takes the money out.
M:23 T:26 Me:53, Wife: 60 S:18 D:16 filed 7/16 W moved out 4/28/17