erm this is a VERY good questions..
to be honest i dont know.. hard to calculate as i had some stuff..before from previous projects..
and i bought other stuff..
the first cage took me about 4 hrs too hand cut and put together and recut (i mis calculated some pieces hehehee)
i also build a second cage this weekend..
it was much easier cuz i bought a table saw (which i always wanted one to do various projects.. so i thought this would be time to get one since home depot had one on sale LOL). so this was the biggest purchase for this project so to speak
the second one turned out much better
but i'm sure as i build more i will be making more adjustment