I have a problem with where I'm going to go after High School?

Me and my girlfriend are seniors in high school. We both plan on going to a local community college right after graduation and then transfer to our own universities after 2 years. But because the area we live in has a high unemployment rate for seniors, neither of us have found a job yet. I hope to get one sometime in the next month or so.

Before the time I graduate, I will have to find myself a car and a place to live to be able to get to this community college that is about 8 miles away. Her grandmother is getting to that age where she will soon not be able to take care of herself. And her grandmother has already paid off her house and vehicle which she plans to give to my girlfriend. My girlfriend, her grandmother and father plan to live in that same house instead of pointlessly buying another one. I, on the other hand, do not have any relatives willing to give me a car when I reach 18, or have a house paid off. They live in rented houses and have lived that way ever since they moved to Florida. (My parents are split up by the way.)

I have the option to move in with them and have that right to and from the community college campus and a place to live and more job opportunities. But obviously, I hear being dependent like this, if she breaks up with me or if her dad gets mad at me for some reason, I will be kicked out and will have to fend for myself.

We've been dating for over 2 years, and never had any problems, so it's unlikely. What do you think?