Please bear with me as I learn how to do this stuff. I'm using PaintShop Pro, and this is my first effort. I fudged a roof over the garage, but changing the entry way is beyond my skills right now. Hoping somebody really good can do the job for you. But at least you can get an idea for colors:

Thank you awm, that's a great start! It does help me visualize. I'd love to see with the bottom stone part of the house and garage white too. May I ask what you used to do that? I can't figure out Photoshop...
Thanks again!

Well, I barely know what I'm doing, but...

I used the color picker tool (looks like an eye dropper) to select the current color of the house (the tawny color) & used it to create the foreground color (the two color squares: top is foreground color, bottom is background color). I double clicked on the background color square and changed it to white.

Then I used the Magic Wand selection tool to select the tawny colored area (Magic Wand is supposed to select areas of the same color), clicked on the color changer icon (the two squares again), hovered over the selection (which should be only the tawny color), right clicked to fill in with the background color (white).

But the Magic Wand isn't that accurate, so I used the free hand selection tool to outline some sections, then used the color changer tool: right click to replace the foreground color(tawny) with background color (white).

I then did the same with the blue shutters: set blue as the foreground color, gray for the background color, selected the blue shutters and used the color changer to swap foreground color for background color.

I copied a section of the house roof and pasted it over the garage so it looks like a sloped roof is there.

Other areas I just painted with the paint brush.

I have a book for beginners, and haven't gotten to the drawing section yet, so lots of stumbling & bumbling here. But I think I'm going to like PaintShop Pro.

Wow, thank you for taking the time to do this and for explaining it! I have a lot to learn! :)

My DH is in the roofing biz, so I noticed this right away... I wouldn't do a white house with a white roof :). I like your current siding color. Maybe just the shutters and door need a little change?