Hmmm.... Thought for sure there would be a craft/diy board!

I'm starting to think about making my daughter a twin sized quilt for when she's older. I am starting to plan it now because these things take me forever. I may decide to do a quilted duvet cover, because it's quite cold here so we usually just use quilts in the cooler summer nights, and need down the rest of the time.
Anyway. Are fat quarters worth it? My vision is a vintage looking floral quilt, with brighter yellows/greens to tie into the rest of her room. Some of the liberty prints would look great but they are $$$$$!
I'm looking at other online fabric stores (no great local options) and wondering if I should consider a fat quarters bundle....and then add in other prints? I've only made one other quilt, her baby quilt, so I'm a total newb,