What would YOU do??

Okay ladies, I graduated LPN school when I was 23 y/o in 1993 and have worked Full-time my entire nursing career up until I had my 2nd child in 2004. At that time, I worked the weekend program working every weekend 11-7 for a year and then I went to working part-time 3-11 and then I went per-diem hardly working at all and finally quitting in 2006. I started a direct sales business in Nov. of 2004 and beyond my wildest dreams could I have imagined that my business has become extremely successful. I made $75,000 last year and will make over $100,000 this year and honestly, I work about 40 hrs./month. I am truly blessed to be able to be home with my daughter and make this kind of money, however, I missed nursing and went to work at the hospital part-time 3-11 and I did that for 6 months and unfortunately I had to quit since I had to work every other weekend and that is when I do home parties for my business so my hubby said that if my nursing job interfered with where the "real" money was coming from, I would have to quit, so I did. Well, lately, I have had this OVERWHELMING desire to go back and get my RN. My daughter, who will be turning 5 in august and will be starting all day kindegarden in August and I will be home alone M-F. YES, I have my home business, however, I do not have enough work to keep me busy. I applied at a doctors office and had a 2nd interview and those hours are M, Tues, Weds (20 hrs/wk) no weekends and no holidays which will not affect my business thank god. I'm not sure if I will be satisfied just having a job back in nursing or if I should go back for my RN. Plus, if I do go back to school, will I be able to handle working a part-time nursing job, doing my business, taking care of a family and house and going back to school and studying. Do you think I should just stick to my business which continues to grow and grow and I have the potential of making lots and lots of money and working as an LPN part-time and forget about going back to school. My husband says to do whatever I want and it wouldn't hurt to have my RN, however, my brother thinks I am crazy considering the money I am making with my home business and feels that in 5 years I will be making over $250K and if I go back to school I could jeopardize that, what would you do?? By the way, I will be 39 at the end of this month.