dude that's insane.
I get bottles of 1L of 70mg nicotine liquid for, like, £40 and they last me a couple of years.
FYI the "nicotine shot" they sell to the public, at 18mg, is the strongest you can buy from a store. This is about 4 times stronger.
I find that 40mg is a decent mix, gives me the hit of actually smoking, in just 1-2 drags.
18mg is for babies. When i'm flying i'll put a generous drop of 18mg on my finger and rub it aaaaalll the way inside my nose, and another on the gums, pretty solid brain hit that will last 3/4 hours. (ofc these days nobody actually watches you if you sneak a cheeky puff with your vape, provided that you dont have set up to MOUNTAINS OF SMOKE setting)