Being fully aware of your entire situation, Frank, I DISAGREE with Sara.
Additionally, I thought you agreed with the majority that under these conditions your best bet is to save yourself.
At this stage, I believe that anything you do that even gets your mind geared towards "DBing" or anything similar is going to set you off on that course at your own personal expense.
The so-called "fixer" in you wants and needs further distraction from dealing with your own pain, which reaches back into your childhood by your own admission. Your DESIRE to "save" your marriage comes from two places, only one of which is your heart.
The other is your own need to continue to avoid dealing with your own demons.
You are worldly and you are stubborn.
What you want is another "project" that looks good on the outside.
That is not going to work again because the real problem with you is on the INSIDE.
WAKE UP. MAN UP. DEAL WITH FRANK.
Anything that would steer you onto ANY other course at this stage would be based on naivete if not outright deception.