In order to save your M IMO you must first save yourself. I am not proposing that you "hold on" to your W. On the contrary, I agree 100% with letting her go, drop the rope, whatever you want to call it.
I also agree that you need to protect yourself. If the way to do this is with a legal process well then go do what you have to do.
In our state you can file for a legal separation...this provides the finacial protection that you are looking for.
No one here can tell you if you should or should not fight or try to save your M. This is a call you must make.
Also, why have her carry the football. Not man enough or do not want to make the call. If it is the later maybe you should look at this.
Look dude - either way you go just remember this...all of this is YOUR call, this is YOUR life. Whatever youdo..do it with no regrets.
Eric
"The difficulties of Life are intended to make us BETTER,not bitter". "Fear is a prison, where you are the jailer. FREE YOURSELF!" "Life is usually all about how you handle Plan B." - Jack3Beans