JP, I will bet you $10 to $1 that this plant is much older than 10 years. It is a huge Platycerium bifurcatum. I assume that you live in a sub-tropical area, perhaps S. FL or S. CA and can leave it outside all year? As Hetty said, placing it in the crook of the tree will be a great spot. It will be stable that way. Have you considered reducing its size by removing some of the plants? You know, there may be a dozen individual plants there. You could have multiple, though still large, plants. That solves the problem of weight. I too had a plant just as large as you and I divided it because I could no longer move it inside because of the size/weight. I DON'T live in a sub-tropical region.
