Uh, you are aware of the concept of a pre-nup, right?
I'm pretty sure a marriage + a solid pre-nuptial agreement would put you on much better legal/financial ground than a "committed non-martial relationship" without a written contract.
apparently prenups are pretty much worthless in this day and age. Even if its air tight, the other lawyer can just say that they were forced to sign the prenup(i.e. no prenup = no marriage) and poof, your air tight prenup is null and void
It's pretty simple: both you and your spouse-to-be need a lawyer to review the document before signing it. Then nobody can claim they were forced or didn't understand.
And, really, this is pretty basic legal advice. You should always have an independent, disinterested lawyer review contracts before you sign them.
I'm pretty sure a marriage + a solid pre-nuptial agreement would put you on much better legal/financial ground than a "committed non-martial relationship" without a written contract.