This is your typical bubble gun
You have a small fluid pump driven by a worm gear off the blower motor.
That pumps soap mix over the bubble ring with a catch cup to return excess bubble fluid to the bottle.
Cut off the handle and bottle mount.
Mount it under the wing or fuse as a pod with a servo to move the trigger mechanism.
rig it with a remote tank and battery.
I say use a servo to pull the trigger because I think it also operates the dip movement for the bubble ring.
The guns sell for a buck or two so hacking a few up to experiment with won't break the bank.