I just did this exact thing. ‘07 Civic Si sedan totaled by insurance, bought a new Orange ‘18 Fit Ex manual. Not QUITE as peppy as the Si when getting into vtec territory, but still not a bad driver for an economy car. Smart key is awesome, Honda sense kinda cool, Android Auto could be better. Not exactly my dream…

2007 Civic Si requires premium. 2013 Ford Flex Ecoboost requires....regular. Just depends on the tuning.

Actually new info recommends rear facing until 2. Some European countries recommend 4.  

Have you ever used searchtempest.com? You can do distance searches with your zip code and whatever search terms you’d normally use on craigslist. I like the “Direct Results” option that opens a pop up with actual craigslist pages vs. Google because Google can miss things.