HHhmmmm....well, lets see...a CFI who's being paid less than $12/hr, logs about 30-60 hours a month on a 152/172/pa28, etc., with no benefits...and up pops a job flying a twin-turbine/jet Part 121 gig that pays $25k with solid benefits...sounds like you didn't pay attention to those details.
I think $25K/yr is pretty good for someone who wants to work 100 hours or less per month. Lets say you work another 60 hours or so in other non-flying job making $10/hr, and here you go...now you're making $32,200/year. Not bad at all!