I am not sure I'd answer at all....you guys are going back and forth without any progress. And based on prior discussions, isn't this in your attorney's court now? Let her get the ball rolling on the parenting plan.
I do think it's important that you know the answers to her questions though. You do need to start thinking about what the plan for YOU is. And don't say "I'll do whatever I have to for 50/50"....that's really not an answer. Nor is "the best plan is to reconcile"....put it out of your mind.
If you get a shared custody agreement, are you keeping or selling the house? If you get every other weekend, are you keeping or selling the house? Same question for each of these items. My guess is the answer is the same in most cases...