$2000 per day is doable with 1K accs. It all depends on your niche and offers.
I was promoting non incentive, country specific email submit offer with 30-40 accounts and had $70-80 per day.
Unfortunately, didn't have time or nerves to scale this up and the offer I was promoting isn't available anymore.
So, all you need to do is get 20-30 non incentive offers with nice payout ($2+) and you're good to go.