all interesting and good ideas. However,you should first check to determine whether your state is a 'community property' state or not.
The laws are different, and vary specifically according, so what works in one state, may not work in another.
If you are thinking about divorce before you get married, then you probably shouldn't get married.
Good idea, read the rules on community property that apply, and if necessary, move to another state where the rules are more friendly to maintaining a separate estate.
Some states, you can acquire and dispose of assets quite freely even after marriage, so long as there is no prospect of divorce. Of course, you have to be filing taxes as "married and filing separately" for there to be a prayer of this working at all.
My sister married a Iranian man. They separated. A little later, she discovered he went out and bought a house. The courts backed him up and said she had no claim to that house. They were still married at the time. He left her penniless and homeless.