Hey guys, I can't afford a gym membership but really want to start working on my upper body. I have decent tone in my leg muscles already, but my upper body needs a lot more work. I'm thinking of buying a few things to create an at-home routine but don't want to spend the money without having a specific plan. My first inclination is to focus on various kind of push ups, pull ups, sit ups, and cross-body stuff for the obliques. Over time I'll probably add some mid and lower back focused stuff, and specific exercises for traps. I've been looking at resistance bands and a strap system similar to the TRX ones.

I'm looking for suggestions for routines and specific equipment on a budget. Usually I'd go for a well-known program instead of building my own, but there aren't many at-home programs that make sense to me. I've been looking into the bodyweight routine on the ftmfitness wiki, so I'll probably start there unless there with a few modifications unless you guys have other suggestions (especially since that one hasn't been updated for 6 years).