As mentioned, you can build/scale/adjust our Fall Spartan Pull-Up Challenge to what you can and want to do.
(If you just stumbled on this page, here is how to sign up and info on the 2018 Fall Spartan Challenge)
I'll be sending out more info on this Monday September 17 — on getting your pretests done and getting ready for our 9/23/2018 start date.
But here (scribbled on a wall at Spartan HQ) is my initial goal plan for the challenge. Need to test myself next week and then I'll fill stuff up.