Correct not the house, mine is predetermined and the model is not known it's the lot size I'm pretty sure.
As far as adding a golf garage at about $9K U have to add the cost of that oversized lot, about $7500++.
So it's not just the bump outs but to say that it comes with the house.........you're paying one way or the other.
We'll have a car & pickup truck along with two golf carts and we think it will work with a two car garage on a 60' wide lot we can only bump the garage forward 2' for about $1200.
Truck will remain in the drive, both carts being solar will love being outside all day.
Last point on having a wall for privacy, on a regular lot that puts your house only 10' from a wall, some would think that may feel closed in cutting down your view.
There are other ways to obtain some privacy, strategic landscaping for example is less expensive. A backyard that faces big lots will get you extra distance from your neighbor. A dead end street at your back yard you get the idea, ask your agent to email U the detailed lot site plans.