For Drop Inn, the Reedy 3300kv is plenty. You've seen Pierce hurtling recklessly around with that motor, and the only thing he lacks is any regard for throttle control.....just nail the gearing and you're sorted.
A 2wd running a modest motor, or maybe even an 8.5T, which is the most I'd recommend for Drop Inn in 2wd, draws under 1500mah.
Carnim draws far more because a) he drives a 4wd, much less efficient, b) runs a 6.5T and c) is a ruthless throttle-masher