Wife wants to Seperate advice needed

Hi my wife of 17 years wants a separation. To cut a long story short I basically have driven her to this point, I am now receiving help and have seen how I have treated her and believe I will be a good husband and father. I love her very much and I know she still loves the man she married but not now how I changed?
Unfortunately this change and reflection has come too late for me.
My wife wants me to move out and go down the lines of a separation for a period of time (6months years? no idea) (This hopefully will allow her space and accept me back. Right now she is full of anger as it has taken so long for me to see the light) we have a joint Mortgage and two teenage boys. We currently sleep in separate rooms. I am prepared to move out in the hope it will mend our marriage. Now right now looking at websites and talking to various people I am a confused person and have no idea what to do. We have agreed that we need to get some legal doc in place re who pays what who takes the kids etc. I earned 2/3 more than my wife and for the last 17 years been the bread winner and put all moneys into house home and family)Now if I move out financially I cannot afford to rent a 2 bed house as my wife’s suggestion as there will be times I will have the kids. I have done the budget and costs and cannot even afford to rent a room for £500 an month let alone the extra costs for me to live. My wife then stated she would pay half the mortgage and a few other bits which means I will be in the black but she will not afford to live by a large amount and seems to think that as she will now be a single mother living at home with two boys she will.
If I move out for say 6 months can I move back in as we both have equal rights to live in the house and or do I lose my rights etc.
Basically I need to chat to someone who has had similar circumstances and possible give me some advice.

I'm sure everybody could give you a different answer to this.

Reflecting on my own personal position in relation to yours, DO NOT move out - you will probably never get back in.
Do everything you can while you are in the house to try and repair the relationship, if that is what you want. Use any agencies you can .
If it does end up with you having to move out, I would seek legal advice BEFORE that happens.

Hello bikee.
Thank you for the advice and duly noted.

Really don't move out - I was sort of like you and my ex took advantage!