So, I'm American and my fiancé is Australian. We're getting married in the States, then flying back to Australia where we live. We've been living together for a few years and have everything we need, but are hoping to move to American in a few years and would pretty much like cash to help pay for the trip and get us started there. Gifts are really not something we want because even though we will need stuff to get started up when we move over to the States, my parents have made it clear that they don't have the space to store it for us (they live in a pretty small apartment). So, we can't take gifts back to Australia and we can't store them in the States (or at least not much). How can I express this to our guests in a polite way?