Hi I have a 2011 dodge charger. I also have 3 kids ages 5, 5, and 6 (2 of the kids are my husbands and come over every weekend) Getting a bigger car is not an option right now, I need the narrowest carseats available plus the safest under $100 because we would have to buy 3. one of the 5yr olds weighs about 45lbs 6yr old 45lbs and 5yr old 40lbs. Please can anyone suggest any carseats please. Thanks