Well, I'm officially a Dark Devil owner now. The seeds finally arrived!
Still some decisions to make and actions to take. Looking into some screening/camouflage plants for the outdoor grow. Some tall grasses, thistles, maybe even some sages should help keep the key plants safe from casual observation. There are some ragweeds that would be perfect, but I haven't found a place that sells ragweed seeds yet.
I still plan on growing one or two plants inside. I can probably get away with it in the attic, since they'll be done before it gets too hot up there. I just have to decide about the lights. I have a few clamp lamps and shop lights around here, maybe enough to do the job. I thought about building a COB lamp, since there's some good plans and parts lists available. Or maybe just go with a regular grow light, like a MarsHydro or something similar.
I'm thinking it would be better to just get a grow light. Trying to rig up a bunch of clamp lamps and shop lights means lots of cords and lots of hangers. One lamp, one cord, one timer seems a lot simpler.