DIY LED is Very easy. I would go with either the 24 or 36 Dimmable kit. I would also call or email them about getting a couple of different colors with it. For instance I would do something like:
12 10K White
12 Royal Blue
6 Blue
3 Violet
3 6500k White
=36 total LED's
The only other things you would need are a heatsink, wire, and thermal adhesive. You can get the heatsink from aquastyle or from rapidled. Use the thermal adhesive to attach the LED's to the heatsink, unless you get one that it drilled from Rapidled, then you just want to use the included screws and some thermal paste. If you go with 36 LED's you will need another driver and you can get those for about $33. Each driver will safely run 12-14 LED's.
I would be happy to help you with the build if you need. I have a soldering iron and solder and, as I said, I have done a number of builds.