Hi! We are also a young family in our late twenties and we are waiting to buy. It is really hard not to want a place of your own to decorate a nursery and do lots of things for the baby that it seems like you NEED. We just had a baby this summer and hell yes, it motivated me to want to buy. Babies themselves don’t take up space but their swings, high chairs, exersaucers, car seats, cribs, changing tables, etc. take up tons of room. If you decide to have another baby the space you use more than doubles! Think toddler beds, art easels, toys from the in-laws that are bigger than your couch and make awful noises, a place for learning letters, shapes, etc. My advice and what we are doing is to rent a nice spacious place, maybe one where the landlord will let you customize a little for your wife’s nesting instinct (it is real, I went crazy cleaning and nesting with our first baby) and be glad when in a year or two for the same price you are looking at now you can buy a house to grow into, not out of!