WideMike,
Kinda sounds like you weren't too interested in that particular job. I have spent far more on interviews; ie. airfare, rental car, hotel, meals etc. --- really wanted the job, didn't get it though - darn, maybe next time. Could be that age was an issue, at sixty years old not too many folks want to hire me anymore, even though I meet or exceed required qualifications, have excellent health, and I have at least 10 more years of productivity in me.
Some companies will offer to cover travel costs up front. If it wasn't offered I wouldn't ask, especially for 100 miles.
The old adage "Nothing Ventured - Nothing Gained" would somewhat fit this.