MIL has been using the infant seat in her car but A's pretty much outgrown it. MIL lives in Orlando and only has her for a few hours on Saturday. Mostly they just go on walks around the neighborhood but maybe every other week she drives her to Publix or the mall which are both within 5 miles. I need to buy MIL a convertible seat for her car but I'm thinking we can do a cheaper one than our daily one What carseat do you use for things like this?