hi,
I agree with Bluebell, 3 yds for borders cut on lengthwise grain, and 32 fat quarters will give you leftovers for your stash, and without seeing the pattern it's hard to say anything else. If pattern need many different fabric whether in only a couple of colorways or if it's going to be more scrappy then you need a lot of different fabrics also. Perhaps you can see what size pieces you're going to cut and maybe you have fabric in your stash that will surfice (whether it's scrappy or a particular color). Then maybe you won't have to buy as much fabric
peel