A new large extinguisher is on the floor near the front door. It’s rated for electrical, chemical and wood fires. This is the easiest place to remember where it is at and can be used to fight a fire where ever it is located.
Mounting in the equipment closet or some other place adds the risk of a) delay getting to the extinguisher or b) being trapped by the fire in trying to get it.
At the front door it can quickly be located, grabbed and carried back to where the fire is, while always having access to the default escape route.
"... get on your bad motor scooter and ride!"
Sammy with Montrose