I’m lucky. I’ve got an amazing wife who’s allowed me to have two home gyms.
With two home gyms comes a lot of equipment to choose from. If I was starting over, though, the first piece of equipment I’d buy for my home gym is a kettlebell. And that’s for three main reasons for that:
1) Kettlebells require hardly any space to store or use.
2) Kettlebells (good kettlebells, that is) are seemingly indestructible.
3) There’s not much you can’t do with a kettlebell. With just a single kettlebell and six feet of space, you can get bigger and stronger, improve your conditioning and endurance, or even work on your mobility.
I’ve been doing this for over twenty years now and no tool comes close to the versatility of the kettlebell. As far as home gym investments go, it’s BY FAR the best bang for your buck.