No Marriage Counseling here, just an observation: If you two are on absolute both ends of the spectrum, maybe you shouldnt worry so much about investments per se, but spend more time and thought on compatability models and be brutally honest with yourselves.
Pounding a square peg into a round hole gets tiresome, boring and tedious.
Save your money, if making a “bad” investment is what could potentially save your relationship, one must wonder the merits of the relationship.