I could rent out all the bedrooms, including the master bedroom (with its own bathroom). I don't even know what the right price would be and I've heard plenty of horror stories about renting to people, but if I renteded even two of the rooms at only $350/mo, I'd have two thirds of my housing costs covered!
And, if I ever need to move, I could buy a house somewhere else and keep this one to rent it out. Again, I hear being a landlord sucks - but I have a handyman nearby who could do on-site work for me and once the house is paid off, the renters would basically be paying the mortgage on my second home.
Also, I plan to pay down the principal, too. I'm not making any extra payments just yet, but I am putting money in a savings account. If I have an emergency, I have access to that money today. If I don't have an emergency, then once I have enough saved up, I can pay off a hell of a lot of my house at once.
Owning a home can be a hassle. God damn, I sure as hell learned that right out of the gate. (I did a lot of remodeling to fit my lifestyle and my electrical needs, among other things). One thing it gives you, however, is more options. More choices, even if not mobility.