My 2Stroke combos (the red ones) are solid pine cabinets with Baltic birch baffles and luan back panels. They are very light. Also, Jensen ceramic speaker are light. You could build a combo with 1-12 (or even 1-10) and save weight on a smaller cabinet and one less speaker.
An aluminum chassis could save considerable weight too.

I’m actually working on a “mini” 2Stroke design right now.