Need career advice

I accepted a position on a telemetry unit in December that would be the equivilant of Assist. Manager. I work strictly 3-11. In the mean time, I have been assigned to a couple committees and have done some great networking. (One of my committees is one started by the VP of the hospital.) I think that I could really take my career far in this institution and I am very proud of the facility where I work. Here is my "problem." I have two small children, 6 and 4. I have choosen to work 3-11 while my kids are home because my dh works 5a-2p and there is always someone home with them. However, my dd is in first grade and my ds is in pre-school. I don't see my daughter, except the three nights a week I am off during the school year and don't anticipate that to change next year unless something happens that I can get on days....Tonight I had an EP doctor offer me a job, once again. Every time he sees me he asks if I am ready to leave the hospital and come work for him. He has offered to pay for my Masters Degree if I agreed to stay with him for a certain amount of time. (I have mentioned in the past I was interested in going back to school.) Tonight, he said "name your salary." Then walked over and wrote a figure on a sheet of paper that is about $5500 more than I currantly make,even with overtime. I think he is a really nice guy, but do believe he would be difficult to work with on a day to day basis. I also think that I have a really good chance of moving up the ladder in this position, but that is not guaranteed, lol. So what would you do? (I should point out that I don't work weekends or holidays in this position and also the hospital does have tuition reimbursement as well.)