Open-ended maintenance can be modified by the court.
A change in circumstances of either party can alter the original maintenance decision.
During your trial, the court will use that list of expenses, among other factors, in determining whether permanent or rehabilitative maintenance is appropriate.
With that information in hand, your attorney can help you gather the information and the supporting documentation needed to address your maintenance claim.
Your "fault" will not be considered in determining whether or not you are entitled to maintenance, but it could result in a substantial reduction of your award.
Be very careful and seek competent legal counsel if this troublesome matter concerns you.
Only the fault of the party seeking maintenance will be considered.
The fault of the party against whom maintenance is sought, on the other hand, will generally not be considered.
Maintenance is "spousal support" paid by one spouse to another (we used to call it "alimony").