About to be homeless kinda?

21m been struggling financially for about a month now(probation/duis)I was staying with a friend but we had a falling out and I got kicked out.im able to stay at my grandparents but they live around 30 miles outta town and I have no car.i have no money at all and have to pay 150 a week in fees or risk being jailed(up to a year for second dui I think?) I’m really deciding on staying at the shelters and working as many hours as I can to get a hotel or something? Is this a dumb decision? And also any tips or resources for living on the streets as well? (Billings montana btw:))