Bat Mitzvah DJ Advice

My child is having a Bat Mitzvah this summer and we're wanting to hire a DJ. I'm wondering if anyone can give us some guidance? It was suggested that we hire a DJ team including an Emcee and dancers to energize the crowd, so it would be a team of 3-4 people - is that overkill?  It sounds like it will be in the $3-5K range for a party that's 4 hours long.  Does that sound right?  Any advice is welcome.