80+ doughnuts

I did a mixture when I first invested in donuts when it came to buying a character or premiums. The premium characters characters do earn more than the regular ones but the premium decorations help you build up your multiplier. Right now my multiplier is at 100 percent. That means every payout is double no matter the job or the building. I've spent a little bit of donuts with each update getting my multiplier to increase. Took me months to do this. You might want to think about it depending on what level you're on and how much land you have left to purchase.