I just bought my first home recently, and it is an opportunity to build a great home gym. Covid times also make the choice easier. I expect real gyms will become a thing again eventually, but now is as good a time than ever to commit to the longterm idea of having a great home gym.
So far it's just got a few things. I'm gradually furnishing the space mostly with commercial-quality used equipment, as opposed to quickly getting cheaper stuff.
I bought self-leveling concrete underlayment to level the uneven stone and concrete floor in this 1890's home. I also invested in good dehumidifiers and air purifiers, alongside a commitment to regular vacuuming for dust. Pouring the concrete was pretty straightforward.
I got the mats at a nearby farm supply shop. They are stall mats for stables and do the trick.
I'm currently on the lookout for a squat rack and an olympic bar with some weights.