Asking Before I Build

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I have always wanted to own a greenhouse but have never had the opportunity to build one. Now that I am retired and still quite able to work, I thought this would be the perfect time to build my greenhouse. I want to make it a business by growing starter plants for various vegetables and flowers. My question is can I use the same greenhouse to grow all varieties of plants? I want to try growing roses, lilies, and many different types of vegetable plants. I just need to know if some plants require more specialized care than others or if I can grow them all within the same greenhouse. I have the design, specs, and builder ready to go, but before I get started I want to make sure I am doing this correctly. Your input would help me a great deal and I hope to have my greenhouse started in the next month or so. Thank you for this opportunity to share my questions on this informative forum; it will be quite useful to me.