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If you have 13 dollars to spare you can get this to start your pulling(biceps, and back) off
Do you have access to amazon? they have over the door bars. I have one like this. You just put it up when you want to use it. Works great.
You can get a bar for $15 AmazonBasics Pull Up and Upper Body Workout Bar [link]
Are you on /r/gainit yet?