Ok,
Like I said I would design the primary and then fit the out building to match.
The design looks good as a barn but not so much as a house.
From a practical standpoint, pun intended, sitting a little ways back from the exterior windows in the upstairs will deprive you of a considerable amount of your view due to the roof design, the higher the house above pond surface the smaller the view.
If this is going to be a 10 to 15 year live in, I would suggest that you look at it as you would the primary structure and design it for maximum benefit of your location instead of as just a utility building. Too many things change in the course of our lives, so make the best of this endeavor. Sounds corny and cliche but focus on your goals when you purchased the property. Make this house fulfill the goals of the primary home you have planned for the future as much as possible.
