They are two of the most powerful wizards in the realm. There is exactly zero chance they will end up destitute, they can write their own freaking ticket. So the answer seems a bit thin to me.
Also, I don't see the connection. They've made a commitment to each other, yes? They're going to be together through thick and thin, yes? If they somehow manage to end up in a life of poverty, it will be a life of poverty together, yes? So, why on earth would you deliberately choose to make it a life of poverty WITHOUT sexy times? Nope, really don't get the logic.