Need advice on moving from other families that moved away from parents?

My husband and I have been married for 5 years now. The only thing we argue about is him wanting to move to the south close to his family. We met in NY where I was born and raised while he was just visiting for the week - he wound up staying here and building a life with me. We have 2 children under the age of 4 and other than financial problems (making it in NY) we are very happy. My family lives just 15 minutes away from our home so I am having a really hard time cutting the umbilical cord. I have never lived anywhere else except NY and my husband has moved numerous times through out his life due to his past careers. The fact is, we are having to ask his mom for money every month to make ends meet. She lives in Texas. My husband wants to either move to Texas where his mom lives or to Oklahoma where his brother and family lives. I finally told my husband after years of fighting that I have faith in him and if he feels like this would be the best move for us than I will be on board with it.... I am terrified of change especially because I am not just thinking about myself - I am thinking about my 2 babies and also the fact that I am having to leave my family as take their grandkids away from them- breaks my heart... My parents haven't helped me financially but when it comes down to it , if I need a baby sitter for one or both of my chil;dren - they are there to help me (even in an emergency) . I am afraid that I will not have that if I go down south because everyone works including his mother. Has anyone else been through this ? Please only kind words ...........................thank you