As far as Lowel being flimsy, I have a Lowel kit going on 24 years old, still working. Yes, replaced a knob or two over the years, the heavy-duty versions of their stands are better value, but the stuff overall is good. I think it is smart to invest in owning lights, I’d buy lights before buying the camera, in fact. They retain good resale value as well, often better than cameras do.
But think first about the kinds of shots you will do most often, and arrange your light purchases for that, reserving for rental the oddball occasional shoots outside your norms.
Will you shoot mostly outdoors? Then you want to invest in HMIs, maybe like the joker bug.
A lot of indoor, close-up interviews? A softlight like the Lowel Rifa, or the Fluorescent Caselight is good. The flos run cool, and pull less power, good for places where juice is limited.
Then again, you may need to combine a softlight with more traditional 3-point hard lights, or shoot in a lot of different places where you need to throw lumens with abandon. If you want to travel, then open-faced lights are lighter, cheaper, more rugged and easier than fresnels, and this is what I have used most of my career. Lowel Omni’s and omni pros are very flexible.
Yeah, I’m an unapologetic Lowel fanboy. Not that there aren’t other brands just as good. But I like their mix-and match kits and all their 007-like accessories.