Firstly, good luck with your business, it takes confidence to launch a business of any kind so congrats on that.
Sadly, whilst pretty bluntly delivered, the above comments are all valid, you’re not going to efficiently make ‘decent’ coffee quickly and repeatedly on a £1000 machine with a built in grinder. It’s hard enough to consistently make a good espresso on those at home.
And certainly not if you only have one member of staff.
Reliability is a huge factor and you might be making as many coffees in a day as a home user would in two months. There’s also things like temperature consistency and the ability to steam milk alongside pulling espresso.
There aren’t many machines approved for commercial and home use for less than £4K. That isn’t to say you can’t use a home one, it just means it’s not tested for that environment.
I have a machine that’s technically apporoved for commercial use and I’m still not sure I’d want to use it in a commercial setting. I’d want two groups (to make two coffees at once) at the very least. If someone comes up and orders three coffees, and you’ve got a single group home machine, their food is going to be cold by the time the coffees are ready.
My suggestion, for whatever it’s worth, would be to consider batch brewing filter coffee in a big commercial batch brewer and then serving from something like this.
It’s not going to be a cappuccino or or flat white but if the coffee isn’t the focus, it’s still a way of quickly dispensing decent enough coffee.
There used to be a coffee shop in East London which was a subsidiary of one of the best roasters in the UK (and NZ) called Ozone who would serve batch brew to commuters in the rush hour from similar canisters to the one above. It served the purpose and was still enjoyable.
Otherwise, making a decent espresso based drink commercially is an expensive and involved process that you can’t really skimp on.
Good luck with the business.