i mean if you got a place to shower and a nearby laundromat it's not too bad. i spent a month or so living out of my car and sleeping at my coworkers but i had mastered the art of sleeping anywhere by then. waking up in pain because of the car seat was a different story tho lol
do you have a nice place cops don't harass you at? the 24 hour parking lots they don't touch you but the lights are annoying unless you have those blindfolds
also pro tip if the sleeping bag is rated for temps that low it's best to undress down to undies/t-shirt and keep them in the bag to put on in the morning. your sleeping bag will heat up from your body faster that way