Hi! We are a family of four with 2 twin girls age 4. We use our Sienna for my hubby's ride to work and for kids school. Our Sienna has about 96k on mileage and we are filling it up every 4 days worth $60 on regular 87 gas. We are thinking of trading it with Prius but with financial restrictions we are a hesitant if it will be really benefit us more. We still owe $7500 on Sienna and we are paying $300/month( about a year and half and its payed off) Prius two 2012 we have to put down $2k and monthly will be $432 (interest is 2.9% for 60 months). Should we trade the Sienna with Prius? Will save on gas with Prius but will have to put down $2k and higher monthly payments or stick with our Sienna with only $300/ monthly and 1 1/2yr. and Will be done paying it Thanks so much!