Object Population after Multiple HitTest Selected

Hi all,
Trying to figure out the best way to allow a user to first select points on different planes and then to populate those points with objects using the ArKit Plugin.

I can select multiple planes and HitTest on those planes and the objects appear straight away, as expected. I want however for the user to not know what they are placing 5 points have been selected until they are selected 5 'spawn' points.

Would FocusSquare be the best way to go on this? But then how do you delay the display of the objects.

Newish to Unity ArKit so any help appreciated.

Thanks.