You may need some help with the planning. Fortunately, expert knowledge is available. They can't network, and they can't identify their problems. Our challenge is to go to a site, survey the equipment, assess the company's needs and plan new equipment. But you must maximize your technology products to be allowed to compete.
Planning is the key.
Buy and utilize the products to their best capacity, deriving the best benefit for the next two to three years. Factor in replacement and depreciation costs. Remember, unlike some products, computer technology doesn't last a lifetime, appreciating on and on. Often it is easier at the time of improvement to update everything at once so the architecture will be the same. One of the pitfalls of the growing company is that as departments and divisions multiply, different managers buy different products.