So, as far as I know, this strat is only possible with "Hello Neighbor 2: Hello-copter DLC" thing (never thought that this DLC is gonna be useful in speedrunning). I don't know why, but the second fling is much easier to do than the first one. Also, I want to add that it might be possible to clip straight into the house with the ending using the drone display, but i wasn't able to get it. Video:

p2w dlc