I'm not much of a person for horde armies anyways, and Madcat87 you've been a great help and you've answered every problem I've run into, thank you for that.
well you don't have to play Hordes with an Ork army, you could go Mech instead, although you still have a large number of models it's a bit more manageable. in my army i have 60 boyz, 24 nobz, Big Mek, Warboss, and Meganobz, along with small groups of Lootas, and Burnas. all of those get run in Trukks, which limits mob size to 12, Looted Wagons, also limit of 12 models, and Battlewagons, limit of 20 models.
most games allow me enough pts to run 4 trukks and a battlewagon, or a variation thereof, and i have three battlewagons, 5 trukks, 1 looted wagon. the nice thing about Orks is also something else you stated, and that is cost. you don't need to purchase anything for Orks except for the infantry models, and those you can get from the AOBR sets at really cheap prices. a box of Fantasy Black Orks and a little conversion will give you either Ard Boyz squad or Meganobz, and a template i have will allow you to actually build your own Meganobz. from there you can do as i have done and kitbash your trukks, or just build trukks straight from scratch, which i have also done. btw, you can also convert the deffkoptas from AOBR into warbikes if your so inclined. in the end, Orks will come out cheaper than any other army you look at simply due to the fact that you can build your own stuff for them.