All depends on your state laws. But I'll assume you are in a common law state. And you are in fairly good shape because no children are involved.
I could write a book on this particular topic...I'm six figures deep on over four lawyers doing nothing to help me and the bitch keeps coming back for more (yes, they have that right). But you will need a lawyer if your ex will not work it out and prepare to get hosed.
At minimum go pay for one consultation, know all of your and her financials, and see what the diso program poops out for spousal support. It may not be as bad as you think, and depending on the state, will only last for half of the time you were married (married 10 years support for five) Assets acquired during the marriage will be split in half to the point of separation, no ifs ands or buts. Anything you brought to the table before the date of marriage remains yours.
Then your best bet is to get together with your wife and as civilized as you can offer her less than what the program says you will pay (because you will pay it) and keep emphasizing you are saving her a lot of $$$$ on lawyer fees.
Just so you know, my ex-wife is worth twice as me, comes from a family worth 10's of millions, we split time evenly with our one child, and because she can afford not to work, every dollar more I make she is entitled too....and the courts keep making me pay her more. The system is screwed.