M.C.
There are quite a few less expensive options if you go for plastic or the metal ones. You could also try a search on Craigslist, there are usually some great choices and since it's used it'll cost much less (and you can always haggle over the price if you need), or eBay. There are also things like connecting tunnels the kids can climb through and blow up ball pits that cost much less and still have a great deal of play value.