I think elastic bands are a waste of time. Get a pull up bar instead. It's only $30.
And then you can get a barbell and weights (about $175 for 300 lbs worth).
Then get a bench press for benching.
You can now do everything you need. Pull ups, chins, dead lifts, bench presses, military press, cleans, rows, and front squats.
Then after a while you can get a power rack.