Or Ka32A11BC with IFEX.....and bambi bucket.
YouTube - Ifex 3000
on video demo of small system 2x18 l pulse useful up to 50 m distance
and 300 l total fluid on AS350 B2
Ka32 can cary 3-4000 l of fluid and pulse guns are 2x25 useful up
to 75 m distance also in night VFR conditions....