Dude,
The $10 dollars or so that you spend for nutrients in a year is such cheap insurance to making things happen right compared to the hundreds (or even thousands) of dollars you will spend in honey to actually USE those nutrients is a non-sequitar in my book.
It's cheap insurance. If you have to throw some out when it expires, so what? You're still ahead of the game by having quick, clean, tasty ferments!
The more you ferment, the more cost effective it is. But I wouldn't hesitate to buy a 2 oz jar of Go-Ferm and another of FermaidK for a single batch. I know that they are gonna do me good, one batch or twelve. It's still WAY cheaper than the honey!