Where is the best place in Orlando to enjoy July 4th fireworks for free.?

Hello my fellow Orlando yahoo's, as we all know the economy is really tight and every dollar counts these days. I am married with three children and I would like to know, where is a very good place to enjoy 4th of July firework festivities for free or for under $50 for 5 people. I was interested in Disney or Universal, can the fireworks show be enjoyed at either of these venues inexpensively. Thanks to all in advance