The Spooktacular Bonus

I've had pretty good luck with the bonus boxes, but no I don't get three every time.
First box: 2 donuts
Second box: 2 donuts
Third box: 3 donuts
Fourth box: 3 donuts
Fifth box: 3 donuts
Sixth box: 1 donut
Seventh box: 3 donuts
*edit* Eighth box: 1 donut

Trying to buy land to build the Wolfcastle mansion on. Guess I need to resist doing that so I can buy another chance at more donuts.