Here is a portable gym that helps you get a full body workout at home or outside. The Gorilla Bow Resistance Trainer comes with adjustable resistance bands, so you can keep your body on its toes. You can adjust the level from 5 to 110 pounds. You can use it to work your arms, abs, legs, and glutes.
The Gorilla Bow can handle up to 300 lbs of tension. It is made of aircraft aluminum. Costs under $150 at this time.