I would ditch the jack rack and get a pullup bar and a set of rings. With the rings on the bar you can adjust the height of them for inverted rows or angled pushups etc. Heck for the cost you could probably get a squat rack or a power rack which would do even more.
I would then look at the primal fitness e-book or any other sourses on body weight training and go with that. For the cost savings you could even buy a kettle bell or two.
Eating primal is not a diet, it is a way of life.
Don't forget to play!