Impossible vs. Possible

Has anyone ever felt like becoming a CRNA is impossible? Even when this is all you have ever wanted to do after becoming a nurse. I feel like this. I never thought of becoming a NP or midwife, it was always CRNA. I love the OR, and the thought of making someone comfortable before and after a major surgery or procedure. The science of medicine is like a fascination to me. I just think its almost impossible for me and I feel discouraged. My goal is to receive my masters degree but I feeling I may have to chose the NP route due to the fact that I need to work. I am a single mother with an almost teenager and I have bills and I can't even begin with how hard it is to save a buck every paycheck without the thought of dipping into my savings account for something that I need not want. I want this so bad.

Has anyone ever had to deal with this, but overcame this and succeeded as a SRNA and doing well in the program? If so, please give me some encouragement or advice. Thank you