I read it like the author moved out with six months expenses in the bank. After six months they hadn't been able to make money off music and weren't having luck

I read it like the author moved out with six months expenses in the bank. After six months they hadn't been able to make money off music and weren't having luck finding a job. So while OP was in the hospital they terminated the lease and GTFO. The roommate sounds like a crappy person, but the author has now also made them homeless.