I have experimented with variations in brewing coffee and came up with a method that works well with my Technivorm brewer.
I don't have anything as advanced as a Technivorm (mine's a Cuisinart DCC 1200) but I certainly have to agree that a bit of experimentation goes a long way. I'm like you and only brew small pots, and I've got it down to exactly the level of water and the amount of coffee required to get the taste consistently where I like it (My wife's a tea person).
So far as the cost is concerned...well, it'd have to go pretty high before I'd stop have my morning coffees. Besides, extrapolating the cost of the final product to a "per gallon" figure, coffee is probably one of the least expensive liquids I need.
I hesitate to think what a gallon of printer ink is worth....and I'll bet it tastes terrible.
ryck