Marriage was implemented on another game I played… except it costed special, secondary types of currency to get. Eg. Gems, cash, gold, crystals, rubies. The currency that costed rl $. It was at $5, the benefits have roughly the same additional values (values of how much you would want it). I think this marriage should also cost rl money, maybe $7.50.
It should be called something else, weddings sound a little off topic for a war game.