Most at home pull-up bars suck, or will cost you an arm and a leg. Here's an easy way to build your own pull-up bar setup at home, with options to customize to your needs. If you use rings, want to swing or do muscle-ups, or just basic pull-ups, there are specs for you. And best of all, it's cheap! You can make this pull-up bar for under $100 and just a few hours of work.