If safety is your reason then how about finding ways to adjust your lifestyle so you aren't in cars as much? Prob safer to walk and use trains?
I used to flip cheap cars when I was single and it would make car ownership nearly free or profit me a little. I flipped dozens of cheap cars most of which were suffering from neglect rather than actually worn out. Fix it, drive it for a few months, sell it, repeat. Interested in that? I was on a shoestring budget all the time b/c I was young and poor.
These days we drive 20+ and 9+ year old cars b/c cars are just expensive. We wear out the older one, mostly save the nice one for trips. I supplement my miles with an ebike. DW and I also carpool to work to reduce our total miles and TCO.
Any interest in classic cars? That's about the only way I know a regular person with a full time job can flip cars and make any profit. Several of us in my family do this. Specialize in a particular brand or style. Restore, repair, etc all DIY. Sell it, repeat. Returns can be quite profitable but requires 100s of hours of your time, a garage, tools, knowledge, etc.
RE: safety - consider the financial safety of your family. They need a home and an income they can rely on as much as possible. The stories homeless people tell can be tales of sudden changes. One day they were getting by, and then the next they were struggling before landing on the street. Sudden unemployment or health problem can be the cause. A year's income in savings would have been helpful. Not a nicer car.
A story I'll never forget was that of a friend of a friend. Couple were DINKS and really obsessed with their grown up toys. New cars, new trucks, new boats, new motorcycles, etc. They were buying vehicles, upgrading same vehicles with whatever the cool accessories were of the moment, and then selling them at some loss just a few months later before buying the next round of toys. These were two married people with four full time jobs just barely staying ahead of their spending. I remember a story of them selling one toy b/c the newer version was ~8 mph faster than the old one. And a vehicle they sold b/c the accessory installer put a mounting hole in the chassis rail an inch from the correct position. No structural problems, was invisible to anyone not under the vehicle, etc - but they immediately sold the vehicle b/c it was no longer "perfect".
End story: divorce, bankruptcy, and long term health problems. Can't imagine any of vehicle specs matters now.