i roast my own coffee and besides the roaster cost (which isn't negligible, but can be considered a hobby expense instead of a consumable expense, so not 1-1), it is 50-75% cheaper to roast your own coffee.

i order green coffee from sweetmarias.com and it's $5-8/lb which makes a good deal more than what's in the $15-25+ 10oz bags from 3rd wave roasters.

plus i learn a new skill and can roast to my preference every time!