How do I respond to this invitation to interview?

From experience look into this dream job because it may not be what you think it is. Still go for the interview and see how it is, do some internet research on the job, and look at the pay difference. Please.... look into it thought because I was in the same boat you were and I didn't do my homework on the DREAM job and it wasn't what I thought it was and I had left my GOOD JOB for a DREAM JOB