Little Cowgirl/Cowboy

I have been very eehhh about decorating a nursery - then I had this brilliant idea! A cowgirl or cowboy theme! See that way I can claim its gender neutral, no matter what you think. So I found this bedding that I really like (although there are a couple other fabrics in the running currently):

So then I found this lady on etsy.com and she'll custom make this bedding and basically has the same fabrics for less than 1/2 the price of buying the set in the store (oh and I dont need the bumper since apparently it kills babies or something).

Ok so now Im trying to figure out if we need to paint the walls - they're currently they all neutral tan color. I was thinking maybe paint half of the wall & add a chair rail. Although I really suck at this kind of stuff so if anyone has any input, it's welcomed!