Do you have a legal separation agreement that outlines that you are barred from the house? If not, it would seem to be illegal of her to change the locks and refuse to let you in. Although it may not be good DB'ing techniques, I would (assuming no legal agreement), announce that since you have no permanent place to stay and are depleting your savings that you will be moving back into the house on (pick a date not too far in the future). She is welcome to stay or to go but that you are no longer willing to be the one to sacrifice to help her accomplish a goal that you do not agree with. If she wants to be out on her own, she should know what it is like to truly be on your own. If she refuses to let you in, do not get angry but have a police officer accompany you to the house.
All this is assuming you can avoid being tagged with "desertion" for moving out in the first place. She is walking all over you and she will never reconcile with a man that does not show proper respect for himself by letting her do it. Don't get angry. Don't raise your voice. Do, however, be firm and strong.
Take this for what it is worth. I have not had great success as I am much better at relationship theory than I am at putting it into practice.
Gone the carvings and those who left their mark. Gone the kings and queens, now only the rats hold sway.
