One of the best things you can spend your money on first is a good coffee grinder. A good quality grinder will provide you with fresh ground coffee each batch, precise grinding for better extraction of flavour and oils, and will last for years to come.
We love, in particular, Baratza grinders for motorized units because they are made in the USA, have accessible parts if needed, and have technical support available if you need troubleshooting advice.
BEWARE of unauthorized sellers of Baratza products. Sometimes these products are obtained illegally using fraudulent credit card information. A list of unauthorized resellers is listed here: http://www.baratza.com/where-to-buy/online-resellers/unauthorized-resellers/
And for COMMERCIAL shops, we do like the BUNN GVH-3 for grinding bulk coffee for your customers in a high volume setting.