Dear Client,
I did my best to try to illustrate you how would your beautiful barn house look with a few changes.
First of all, I think that changing the roof with a metal/zinc one is a great idea, and you should deffinitely go for it! It will make your house look more fresh and give it a modern look, but in the same time it keeps the original idea. It embraces the old with a new in a beautiful way. I think you should keep the window elements if you can, but they deffinitely need to be cleaned or refurbished. If not, I suggest you to go for something simillar.
I have experienced with 2 looks, one where I used a more white exterior with slate grey window frames and shutters as you suggested.
In the second proposal I used a darker grey paint for the exterior and a light gray for the frame for the windows, also removed (or not) the shutters. The window divisions are black, like in the example.
I hope you like the work I did and that will help you make an idea for the project you want to start. In my opinion, they are both beautiful, but I prefer the dark grey painted one. I think it will be easyer to keep it clean during time and it makes a better composition as a whole.
For any other questions or help feel free to contact me!
Best Wishes,
Christina