To this end, what would the position limit impact of quoting both sides equally be? What if I didn't enter the quotes simultaneously? Would I start +/- 1 and then go back to even when I got the other side in?
If I understand your questions correctly, the impact on margins will not change. In the end you will end up with the same orders. Also, liquidating (limits) orders have no impact on margins, so placing them at different times should not impact it. I hope I answered your questions.
We have a set up with a certain platform and FCM where we can set up the risk in a way that working orders will not count AGAINST your buying power.