I think I'd put in some fruit trees, fruit bushes, bee hives, chickens, muscovies, and a milk goat (with a wether for a friend).
I'd get banty chickens cause they don't destroy a garden like full size chickens do. They will keep the weeds scratched out and the bugs off the produce without damaging it once the plants are well established. They will eat tomatoes, so 'mators need to be grown in a greenhouse or screenhouse.
I'd choose muscovies instead of ducks cause they are quiet and they don't require a pond. They are much like chickens as they can survive on puddles instead of a large body of water. They aren't greasy like ducks are. Very good eating and very prolific.
The bees will ensure good pollination of the fruit and veggies as well as provide you with honey.
The goat will produce milk for a year or two from one breeding (some produce much longer than that, I think the record is around 20 years!), and at least one kid for the freezer, more likely 2 or 3 kids for the freezer or for sale/trade. You'd have to find someone nearby with a buck to breed her to. You most likely wouldn't want a buck on 1 acre with a single doe.
I'd put up a greenhouse to have fresh veggies year round. Maybe dig a root cellar for winter storage of all the bounty you'll be producing.
Plant several small gardens. One for annual produce, one for permanent plants, a kitchen garden, and a herb garden. Herbs can be grown among flowers for decoration as well as use. Flowers sell well as farmers markets and can produce an income.
I'd build a solar dehydrator to dry fruits, veggies, & herbs for storage.
If your in a good location, I'd think about adding on instead of selling when you start a family. A small home that's paid for is much more important in today economy than a larger home with a mortgage.
That's what I would do... but you aren't me so you'll have to decide what YOU want to do.