Batteries - Keeping LOTS of batteries charged

[Rep]

So, I have several toys. Most require a battery. The attached photo represents all batteries except my riding lawnmower and gas CC golf cart (still using both).

In the past I’ve been bad about keeping them in good shape through the Michigan winters. Usually, that means I buy a couple of batteries each Spring.

THIS year, I’d like to be nicer to my wallet. My question:

Can I use “jumpers” from battery-to-battery, across all batteries, with one 2 amp (or trickle ) charger to keep everything charged while only having ONE charger plugged in?

I know absolutely zero about electrics and electronics. All advice is appreciated.