Roasting at home to save money is like buying a boat to save on fish cost, or homebrewing beer to save on beer costs. You may be ahead of the game on the ingredient costs, but by the time you factor in the equipment and the labor you've killed your savings for years to come! It's best to not even try to justify it and just keep doing what you're doing...
Totally agree! As I mentioned in my post, once you factor in the roaster it takes a LONG time for it to pay for itself...if it ever really does. My only justification (such as it is) for the expense is the fantastic coffee it allows me to produce!
And anybody who pitches home roasting based on saving money is either trying to sell you a roaster...or pathologically self delusional!