Of course theres cheaper models, but I would suggest looking on ebay, or even kijiji/craigslist for a used one.
as far as more zoom you could look at the 55-250mm, its rather cheap and still produces good quality.
As for a great multipurpose lens, definitely check out the 50mm f/1.8, its fantastic in low light, has great bokeh, and just a sharp lens, especially for its price.