Finally obtained 85 donuts
Wait. You should be able to pick up another 15 before the end of Halloween and she's limited time.
Forum Discussion
If you have something specific in mind, definitely wait for it. I saved enough to get the Duff Brewery then started thinking about a load of other minor stuff I could buy with 190 donuts. After stewing a bit, I finally pulled the trigger on the brewery and it's still one of my favorite buildings in the game. And Duff Man? Can't do much better than that.
