Hello Meinoz and welcome.
Your question has been asked before and I suspect you will find that your budget and requirements are not aligned. In fact, you might triple the budget.
Best bet to speak with a sponsor who handles superauto machines. You will need to provide the # of employees you wish to cater for. You may also wish to consider an office coffee supply company which provides an effective rental of a suitable superauto machine with the purchase of a certain volume of coffee.
Alternately, rent/try/buy may work for you.