my wife left, but still lives with me

[FloydMan]

Her Lawyer is right about not leaving the house under any circumstance becausenof abandonment. However, you must apply to this yourself. Her next step would be to get a reason for you to be the one to move out. This will be the form of initiating a confrontation and getting you to do or say something that would initiate a call to the police. Brother, this is very, very common. Be careful. Wear a halo. Sounds like you are very reasonable and trying to be amicable. However, if she is in a spot it will be her only play. Unfortunately this works a lot in society. Be very very careful. Your lawyer is correct on the rotational but an agreement would need to be made to protect both parties from abandonment issues.
Getting a second or even third legal opinion is very worthwhile, especially if you are not comfortable with the one you saw. I talked to 7 before choosing mine. Opinions of all were almost identical but approach and style were the deciding factors. You need to be comfortable. If you find one that has a collaborative approach, but can litigate effectively if need be then that is a good mix. They need to work in your best interest, not hers. It will all depend on her lawyer's style and approach which you cannot control so you need one that can handle either scenario. Lawyer's make their money on conflict.
As far as income, the fact you make more has no bearing. In fact it can be a problem. It means you pay more. Child support table amounts are a must and should be honoured but if she is looking for spousal support/alimony then that is a battle. She will try to balance income this way. Either way, divorce and separation are very costly ventures for both parties beyond the legal costs. The legal costs will at some point end, but the ongoing living costs will pretty much double. So, don't be surprised if she changes from 50/50 agreement once she realizes these costs and will get more in a non-50/50 arrangement and influence from her lawyer and possible friends of hers and family. This is exactly what happened to me and several other people I know. She will be, if not already in survival mode. Mediation would be the best route to go, but sounds like she is talking to lawyer wihich will mess that approach right up.
So sorry you are hurting and know how hard it is. I let my emotions get in the way of protecting myself properly and was heavily burned. I trusted she I should not have. It has cost a lot to turn the ship around. It worked on the custody front, and slowly the financial front but too a long time and lots of debt to turn it around. Best to get it right the first time with the emotions aside.