Daycare………………and Mother-in-Laws……..?

I work and my husband works and we send our kids to this great daycare. They teach them sign language, letters, numbers, colors, etc. They have thrived so much. (age 15 months and 29 months). I love that daycare. We have had some biting issues, but it is under control. The problem is I have my husband and his mother lecturing me on how I should take my kids out and send them to a cheaper daycare because it would save us 60.00 a week. But, the daycare they want to send them to doesn't teach sign language and have lessons throughout the day. It is just a big play place. I love that my kids are in an athome daycare where there are less kids. How can I explain to them? As the mother of these children, I should be the one making the decisions, right????