Kazabazua, I wish I had millions of dollars. I actually made the rope bridge and the zip line myself from scratch. Welded up the trolly with my gas welding set up. The play structure thing was free. A friend of mine sells real estate. She called me up and told me that a place she had just sold had one that the new owners were just going to have hauled to the dump. They said it was mine if I could come over and take away that day, so I did, and repainted it for my kids. I probably ended up spending about $500 on the rope bridge and the Zip Line by the time I finished them, but that was over 2 summers.
