That’s actually plenty of space to build something solid. I’ve got roughly the same layout and
buy a golf simulator. Their garage-friendly setups have adjustable frames and retractable screens — so you can still park your car when needed. I started with a hitting mat and launch monitor, then later added the full enclosure with a short-throw projector. The immersive feel is night and day once you upgrade to projection. What’s nice is everything is modular, so you don’t have to commit to a giant purchase upfront. Their mats also absorb shock well, so you’re not killing your wrists on concrete. It’s become my favorite place to unwind after work — just put on music, hit a few rounds, and relax without leaving home.