There are zillions of law firms with Dallas offices, you will find something if you cast a wide net. You probably have a better shot of making partner down there, as there will be less competition. Also a lot of companies are based in or have offices in Dallas - there are probably good in-house opportunities to be found.

I think you owe it to your husband to at least try to find an acceptable job in Dallas. Tell him you will take 3-6 months and make a good faith effort to apply to whatever you can find (firms, in-house, SEC, DOJ, maybe DA's office - whatever you would be ok with). If you haven't found anything acceptable after six months, ask him to reconsider the move.

I'm going against the flow here but if it was me I would divorce. Why ya'll ask? Finding a new spouse is easier than finding a great career...and it's effing Texas!!! All they have there are steers and queers since they got no horns so that narrows it down..heehaww.