I would get a membership at the YMCA like I did when I was a broke ass college student on break. During school I just trained on campus.
What I would NOT do is sit at home trying to turn very limited equipment into a lacking home gym. If you want to make real progress, you put the time in.
Once again, ask the guys here with home gyms to post pics of their progress...then compare that to the serious guys here who train at gyms. There MAY be one or two who look impressive, but the vast majority look very average and that home training isn't exactly making them stand out much.
You gain a lot by training around other people in my opinion.
Even if I do build a gym, I will still have a gym membership.
Unless you live in middle Texas and there is nothing around you, get a job, get a car, and do what needs to be done.