be careful using CO2 around cleaning chemicals. Clean compressed air is far safer. Get a little quiet compressor and some in line filters for cleaning!Consider getting a 10 lb Co2 tank, getting it filled won't be double, at least it shouldn't.
I actually have two 10 pounders, one for the keg fridge and one in the brewery.
I use it to move liquids around when cleaning sanitizing kegs, my back is like your wrists...
I have an extra keg that I keep sanitizer in, so convenient
Caustic and CO2 do not get along. CO2 neutralizes Caustic. If things go badly, that reaction cause a vacuum which has the ability to crush tanks. You probably are not using Commercial Sodium Hydroxide based cleaner, but just a headsup! If nothing else it will neutralize your cleaner. We actually blow down our tanks with compressed air to remove the CO2 because of the interaction.