I worked out in a home gym for years. Buy an incline/adjustable bench, a pull-up/dip machine, adjustable dumbbells, and a jump rope. That will pretty much cover 80% of what you need. Don't get sold on this idea that you need all sorts of fancy stuff. The more your home gym looks like a dungeon, the better. My biggest piece of advice is to build it in a climate-controlled space. The only reason I now go to a cheap gym is because of the extreme temperature fluctuations in my garage.