Here is an ork tactica on painting lots of boys by Angel of Death 007 HERE
I too had the hoard itch, mainly from being challenged by a fellow gamer, and so I had to paint up 120+ ork boys. I only got them to gamer standard (skin, clothes, guns) and their bases aren't finished and no details have been done, just the bulk painting.
I have been painting them one unit of 30 boys at a time, in assembly line style. First green skin, then a color for shirts, then a color for trousers, then a color for boots, then bolt gun for weapons. Then I did the same for the next four units. After a game or two I will finish details of a unit like straps, pouches, teef, eyes, etc. to show that they are veteran units. Then I do the bases adding stuff to show part of the story, like SM heads, nid parts, etc. etc. etc.
However, soon I will be assembling and painting jets, so that will be a serious break from boys. That is my favorite part of the ork addiction is the building and painting of vehicles.
Then once I am finally done with the green tide of boys I should have more than enough boys painted that I could run seventeen more truck loads of boys, so that means lots more trucks to build and paint.
Giving me the option to either field the green tide or a speed freak swarm (my favorite
Don't worry about the addiction/itch, it is good to have, as I am quickly on my way to 14000 points of orks. 99% of them painted to gamer standard or better. I hope to see you in the mighty waagh club too, after all, how many ork players do you know that can play a giant point apoc battle and have no allies