Buying a house? YOWZA! Someone is growing up here.
Duh, I wish I could afford renting an apartment for my family.
And about the sleep thing... I seriously WISH I could sleep like that. Enjoy your sleep while you can. Later, you won't have the time. And, with kids, you'll wish days lasted 30 hours. First-hand experience. Then, after 45 - 55, you'll start to sleep less than 10 - 15 years previous; it's a natural development.
So, "live long and prosper", and Good luck with the house!