Thanks for the replies
Currently my children are 10yo (almost 5ft tall and 110pounds), soon to be 5yo (42 inches 42 pounds) and a four month old (16 pounds not sure on inches).
I currently have the baby in the baby RF in the Fisher Price Safe Embrace Convertible that I bought when my older son was 2yo (not yet expired). I have my (soon to be) 5yo FF in a britax marathon and my 10yo is not in a child seat. I am willing to look for other seats as long as they are safe obviously.
We have a second seat (the Graco Turbobooster) in DH's car for our 5yo that I could use.
I went to cars.com and noticed it states "hip room" *sigh* I guess I will look for the cars with the largest hip room and then go see them in person? My mom's SUV had 59 inch "hip room" so I have been looking for somthing similar.
Any ideas or do we have to go with a van?