tompoland However if you have the budget and are roasting around 800g per week, by my calculations the bullet paid for itself in around 18 months (versus buying roasted beans) and it’s the one machine in my coffee suite that genuinely saves money.
That’s impressive. Paid for itself in 18 months. I had to go and do the maths :-)
18 months = 78 weeks.
Total consumption for 800g per week over 18 months: 62.4kg of roasted coffee.
Let’s get some good coffee in the UK, roasted, by roasters that we usually buy here: £30 per kilo, roasted.
Let’s say that coffee costs, when bought in bulk, is £8/kg.
You also said that 1kg of green coffee in reality yields approx. 800g. Therefore I would need to buy 78kg of green coffee to yield 62.4kg of roasted coffee.
So:
62.4kg of roasted coffee, at £30/kg: £1,872 over 18 months if bought from a roaster.
78kg of greens, at £8/kg: £624 over 18 months for green coffee. The difference is £1,248. £69.33 per month.
The cost of the Bullet in the UK is approx. £3,300 after a quick google search. This would mean it would take approx. 47 months for the roaster to pay for itself. That’s just under 4 years. That is, of course, excluding electricity, trial and testing and roasts which just went wrong.
With my usage It would take me over a decade for a roaster like that to pay for itself.
May I ask you to show your maths and rationale, please? I’m curious. :-)
