Slept in a car half of my adult life. I wouldn’t “recommend” it to someone, but I absolutely do it even though I could pay rent if I wanted to live paycheck to paycheck.

If you are going to, do some prep beforehand.

• Get a gym membership to shower.
• Look into co-op office spaces.
• Look for places other people are sleeping. In my small car I slept in the trunk with the seats down. So my head was in the trunk anf feet were in the back seat. i put laundry over my feet so if you didn’t see me get into the car it would look empty.
• Get reflectix and cut out the shape of your windows to create some privacy and insulation. They make bugnets that go over your door so you can roll the windows down and keep bugs out.
• Get a PO box. Most stuff that will make your life easier will have to be ordered online
• Have a job first. Work nights in the winter and day time in the summer.
• Buy nice things, buy it for life.
• A Jetboil for cooking. I built a little cozy out of a few layers of reflectix thats basically a tall cup (wider at the base and narrow at the top). Freezer ziplock bags don’t melt when you pour boiling water into it. So I can boil water in the pot and cook my food in the cozy so I don’t have to do dishes. Or just backpacking dehydrated meals to supliment eating out garbage food all the time.
• Another food option is Huel. It’s a powdered meal substitute.
• Look into a backpacking inflatable mattress if you can get any kind of level sleep surface.
• Get some oder killing shoe spray and use it every night on your shoes.
• get a cooler or two. Even without ice it in, it will keep the temperatures more steady. So put your electionics in that.