Some essential man cave stuff includes a television with the biggest affordable screen, a gaming system with surround sound, a mini fridge, a kegerator and a game table. A few comfortable recliners or a couch are also essential.
A sign that clearly proclaims the man cave is essential at its entrance. Use neon lights or mixed wood work to create a sign at the doorway or just inside the room. Add a coat hanger nearby to hold coats or hats. To make a man cave more comfortable, install a huge framed or angular hammock either in a corner or beside a window. Optionally, set giant bean bags randomly around the room for lounging or just pile a bunch of pillows on the floor in a corner.
Go for the biggest affordable television screen and put together a movie collection with all the classics. Surround sound is essential to fully enjoy sound effects or to get the best out of a gaming experience. Install a kegerator near the sitting area to have beer on tap all the time. A conveniently located mini fridge with bottled beer and sandwiches is also an option. A pool table is essential and so are team posters, vintage models pictures and comic posters. A comfortable throne toilet and a comic collection at hand are important additions to a man cave.