Well I am glad someone is stepping in to fill the void I left when I moved out here to DC.

As for lights, the best would be 2 t5's per tank, 1 6500k and 1 10000k bulb. But if you are set on going LED, by far the best for growing macro algae is the Finnex Planted + 24/7. This light is about 1 inch thick. I am using this on my sump right now and it's pretty awesome. Not $30 each cheap but defenetly cheaper than the radium x15 planted.
Link
As for growing algae for fish food, I found that red gracilaria is the best for fish food. Ulva is best for culturing pods on but it will go sexual and show up in your display. Caulerpa is not palatable by pretty much any fish but it is a good nutrient exporter. Caulerpa needs to be on a strict 18 on 6 off lighting schedule so it does not go sexual. Chaeto is a good all arround nutrient exporter as well. Not much value for resell but grows quick enough to just toss out in the compost pile or give away.
But those 2 needs only will take up 2 or maybe 3 tanks tops, with the other tanks you can focus on the more decorative algae species. These can help supplement the cost of the hobby as they are in regular demand. See the macroalgae section of the forums to find the list of venders that you can get algaes from. But for dragon's breath and dragon's tongue cultures, hit up Shawnv. Most people don't know the difference between all the dragon's algaes but he has them for sure. And some of the algaes, plan on paying a good amount for the cultures as the rare ones are in high demand. I had to pay $50 for my nemastoma culture just so I could get some.