Should I fire my contractors?

I am a business owner of a granite installation company. Everyone that works for us is contracted help.
We have 3 crews (2 man teams per truck) they install granite and get paid a percentage based on the square footage they put in. recently the economy has taken a turn and we are not getting as much work as we used to so i am spreading the work thin amongst all my crews. The problem is that now my company is not making as much money and in return i am not taking a paycheck in order to support my family. I am also dipping into my reserve/safety fund in order to pay the company bills. This is quickly running low.
Here is my question.
In order to support my family and to sustain my company long-term (essentially riding out this storm) I need to get back on a crew myself. This would mean letting go of a team and equally distributing the square footage between myself and the other 2 teams.
I am struggling with this idea because it would mean firing 2 people and taking away potential money from the others in order for my company to keep more of the profits.
I am a family man and I look out for those that work for me, but if I don't make a change soon I could lose my company completely.
Am I doing the right thing?