i got the same kind of offer a year ish ago. Were you given the option to be a 1099 or employed directly with the company? just make sure you have pilot insurance. BTW I told them I wouldn't come in until there are students. I also negotiated almost to the top of the pay scale in the interview. I did turn down a different job that wanted me to just stay at the airport on my off time. If you are low time and/or this is the only option I would 'do work son' since you might not have another option for awhile.
sorry for the random thoughts.