If you have access to 10,000 square feet of space, there are many business ideas you can consider depending on your interests and skills. Here are some examples:

1. Warehouse or Storage Space: Rent out the space to businesses or individuals looking for storage space.
2. Manufacturing Business: Start a manufacturing business such as textile, woodwork, or metalworking that requires a larger space.
3. Fitness Center: If you have a passion for fitness, open a gym or fitness center offering classes, personal training, and equipment rentals.
4. Indoor Farming: With the growing demand for organic products, start an indoor farming business using hydroponic or aquaponic systems to grow crops.
5. Event Space: Rent out the space for events such as weddings, corporate events, or parties.
6. Co-working Space: Create a co-working space for freelancers, entrepreneurs, and small businesses that need a workspace.
7. Retail Space: Start a retail business such as a furniture store, clothing store, or home decoration store that typically requires a larger space.
8. Art Gallery or Studio: If you have an interest in art, open an art gallery or studio that provides space for artists to create and showcase their work.
9. Food Manufacturing: Start a small food manufacturing business such as a bakery, catering kitchen, or commercial kitchen that requires a larger space.

Remember, when starting a business, it is important to research and plan thoroughly, understand your target market and competition, and develop a solid business plan.