Best thing I ever did was get a supplemental home setup. Never went back to the gym after other than to see friends. Once I realized I could have it all, I expanded, especially when I got a bigger home in the suburbs. I occasionally host group lifts and have friends over but mostly train alone.
Classic start is a rack, bench (flat or adjustable), bar and plates.
Rogue, Rep Fitness and Titan see good starting spots as well as used marketplace and Craigslist. Uses commercial can be had too there.
Buddy just got a Rogue SML-1 with adjustable bench from Rep (just as an example). A step up would be a half rack which adds plate storage and pull up bar.