You don't need that stuff, you just need a window and some white card or sheet.
Please dude - just because it works for you
I've got about 9 softboxes, 10 flash heads, and 4 packs and a sh*t-ton of grip gear - and I'm very glad to have them all. Not everything I shoot needs to look like the same old window light. When I want the window light look, I'd rather light it myself in most cases.
If someone wants the control of softboxes and so on, give them some useful advice or save it for the folks who want to shoot in front of windows? Thank you!
As far as the CFL thing
ehhh. Been there. Just not a lot of lumens and for color you'll be extremely lucky if the light is pleasing. They claim 1000w equivalent from four 55 watt flo's. In reality that's likely more in the 600-800 range, and then you'll lose a stop or from the fabric. You may find yourself stuck with 400 speed film or higher. And what about when you want harder light or a smaller soft area?
There just aren't a ton of solutions if you want good output and a traditional softbox (and yes, I know everyone will differe on what "good output" is) - strobes will generally be your most bang for the buck without a lot of monkeying around. If you're not doing motion/video, I'd really consider finding some used monolights with bowens mount - they're all over the place; any softboxes you buy will be useable on a different mount if you upgrade someday.
If you're set on constant light, I'd look into some open-faced tungsten and some diffusion for starters - and grab a used fresnel for harder but pretty light. I KNOW EVERYONE DIFFERS ON THIS and you may have some vision for a specific style. But strobes and stills are a very good match...