Yes, it can be more cost-effective to create your own flower wall compared to renting or purchasing one. By sourcing your own materials, such as faux flowers, fabric for the backdrop, and a frame, you can control the costs and customize the wall to your specific taste. However, it's important to note that while the monetary cost may be lower, creating a flower wall can be time-consuming and labor-intensive. It requires planning, designing, and assembling, which might not be ideal if you're short on time or lack the necessary crafting skills. Additionally, if you desire real flowers, the cost and complexity can significantly increase as they require careful handling and have to be assembled close to the event to maintain their freshness.