Coolingmist Stage 1 $330
JB4 - $430
Intercooler - $700-900
I think I also did bigger injectors and a high flo fuel pump on my last meth/water setup back in 2009. This is ball-park but I agree, this is a shitload more money than guys farting around with their intakes.
You are correct...just depends on your use case. If I wanted to win races, well then more money into the engine would be better than trying to do it on the cheap, but for a DD that performs pretty well and doesn't cost me a load of cash...well one needs to make compromises. I think I'll stick to "farting around". Also, wonderful as top end parts may be, they also cost a lot. "Farting around" is inexpensive and maybe free.
Lots of folks spend money needlessly when there are options that are much less expensive or free that will work. I'm one of those folks that looks for the options.