We operate DE Stubby from a 1700' grass field, with trees at one end, wires at the other. Plenty of room. I have operated from a 1400' runway, no obstacles at ether end, again, plenty of room. Even with obstacles, would not be a problem. With favorable conditions, much shorter runways would probably be useable.
And, this experience was with a non-optimal prop. Our new Performance Prop should make take-offs less critical.
And, so far, all flying was with one person in the airplane. Haven't flown a passenger, yet.