On top of leverage Investing, do you and your wife combine resources for investment? How would you recommend young couples who are starting to invest to manage this?

I do not recommend to leverage but is okay for combining resources with wife.

Leveraging is risky. You might lose more than you expected.

As for combining resources with wife for investment, it is very important for the 2 to communicate very clearly on the financial goals and work towards achieving them together. Communications is the key to a successful marriage.

The only asset class me n my spouse combine effort is on properties, not on equities as she doesn't believe in it.
Its always good to have both on board to a same direction especially on family financing and investment.