Too much hair

I have four daughters... And they all have a LOT of LONG hair (Myra's not as long, but it's getting there)! On top of that I have LONG hair too (and mine is falling out some because of just having a baby). This leads to LOTS of hair EVERYWHERE! This leads to a problem with the vacuum. About every 6 weeks I have to extract the caught hair from the beater bar on the vacuum or it will tie up the bar and burn out the belt. I'm not sure how to fix this...