Maybe even more since my DZ 140 pulls more than 18 pounds tested on the bench. A Moki 180 must be stronger than my YS.

The prop was an APC 17 x 8 and put not enough load to the motor. I don't know if a larger prop turning slower will generate more or less thrust.

My thinking is that you should keep around 1.5 : 1 in power to weight ratio since a 1 : 1 ratio has not unlimited vertical, 1 : 1 ratio will give vertical until drag stops the plane and then should be able to torque roll all day. Full throttle torque rolls are hard to do since a blast of air is sometimes required to "straighten" the plane.