Consider your competition and how you will handle it. People often underestimate their competitors and aim to capture an unrealistically high proportion of the market. When considering what crop you might grow you need to assess your knowledge of that crop. It is easy to underestimate the skills required to grow a good horticultural crop, particularly to produce it to schedule and of good quality. This is a major cause of failure.
Experts consider it takes about three years to learn how to produce a premium crop.
Take care not to be fooled that 'hydroponics gives total control of the crop'. This is nonsense. Hydroponics influences the root system of the plant, but the upper part is influenced by the environment. How a plant grows is influenced by factors such as temperature, light level, day length, competition, etc, and its genetic make up. It is often practically impossible to change the growth pattern of a plant.