I recently read through posts of rent increase letters and how to approach them with the tenants.  I want to play it safe and give ample time for them to find a new place should they decide to not continue renting wit...

Just make round things square, have furniture in bland boring grey, beige or graige, have a white and grey color palette.  

Actually I had a friend who used a SW palette of different colors that are supposed to go together and from room to room they seemed to do that.

Awesome choices on design and color palette. 

I like the grey finish palette.)

Another item to consider is how the roof plays into the color palette. 

The existing buildings are fairly good palettes to develop into condos, retail, and mixed use developments that are currently popular. 

I think I'm going to let her, with a limited-yet-beyond eggshell palette of colors.

It can help you with the concept if you give some direction, like 'I want something midcentury modern' or 'design me a cabin with modern rustic touches featuring a green and brown color palette.'

Your biggest problems are the lack of reasonable proportions to the house and the monotone palette.