Reply to Idea for controller-I'm New Please Help

I am new here and I got inspired by all the diy creations i saw on youtube and etc. I am very familiar with ableton already and am switching from pc to mac in about a week or so. I want to build i controller to fit exactly my needs, as I am more of a producer than dj. I want a controller with LOTS of knobs and LOTS of faders. Right now I am believeing about 27 knobs and 9 faders(8 tracks and a master; 3 knobs for each track. Ahout how much will this cost me. From watching the videos it seems easy enough to do. I also am unsure of whether i should build it with leds or not. Like i said i am a producer and hence don't perform or create in the dark. Can somebody help me get started with this. Thanks