I think your idea is great......It's your guest room and it should reflect your style.

But may I suggest that the paint color is a very dusty rose rather then true pink......

Having pale pink in the guest room would be fine, just balance out the what some would consider feminine touches with masculine. For example in the bedroom below the walls are pale pink but the bed has a more masculine feel to it. Then their is the art which is nether feminine or masculine. Adding industrial lighting, black accents etc would also help to keep the room balanced for both sexes. If you fear that pale pink is not the root you wish to go then paint the room grey and add some pink through art or in subtle ways like throw pillows or flowers etc. Post pics when your room is complete.

Love the Blue with that pink painting on the bottom left @Mark! that certainly balances things out. The dark grey is nice on the bottom right as well