Here is a list of the very basic exercise equipment that you would need when starting out a home gym. These are some of the least expensive items that I have found.
Pulling Harness $100
Lifting Platform $200
Stone Mold $245
Bumper plates $388
Squat Rack $140
Weightlifting Cage $220
Some of these prices like the keg as well as the lifting platform are estimates. Also, you have the choice between either a weightlifting cage, or a rack so this has the less expensive rack. The total does not include tax or shipping and handling
This is a very basic list of the general pieces of equipment that you need when starting your own home gym. I hope this has helped you in finding the best equipment to design your gym.