Does anyone know about Childcare for deployment family?very cheap or no cost 

I know there is some kind of program that specializes in comfort for children but I don't know if daycare is with that. I think you need to look for camp pendleton helpline of something. 

If you're talking about the respite care for deployment, the USMC doesn't have funding for that anymore. The other branches may (I think the Army specifically DOES). 

Volunteer on base.. They will give you FREE childcare while you are volunteering.