Elkenders

I've been researching for ages but struggling to tell what's the exact best product. Ideally I'd like a combination of products that allows for usb c charging (to be seen primarily) that feels tightly integrated into the Brompton. I like the fork integration of the official light but would prefer usb c charging. I can more easily find appropriate mounts to attach to the screw on the back of the saddle. I've seen AliExpress brackets that use GoPro style mount holes then you adapt to Garmin/Cateye or whatever but I haven't seen photos of them in use and I've read they can interfere with the luggage block. Ideally someone else would have a combo of products that I can see works aesthetically and practically and I'd just get the same.

What do people here use?

I'm picking up a C Line Explore and wondering why there's a weight difference between these two. I'm interested in the free bag but I assume there are structural differences if the one above is a KG lighter?

I'm moderately tech savvy, a little experience with most OS and comfortable with hardware. I've got some basic things working in Docker. I want to start self hosting my photo backup, Bitwarden, Jellyfish, Sonarr and Radarr, Pi hole, Home Assistant and replace Dropbox. But the more I dive into the hardware and setup the more muddled I'm finding myself.

I'm very concerned about power draw so the lower the consumption the better. I do want some parity, though I'm willing to I introduce that once it's set up. I'm not particularly concerned with transcoding but I guess it'd be a nice bonus.

Is a QNAP alone valid? Or perhaps I'm better off with a Pi and my huge GDrive while I learn? Or a NUC with better transcoding capability? I want to access my data internally, stream content to a Chromecast with Google TV.

My instinct is both a NUC and a separate NAS but I'e love it if anyone has some insight.

Thanks!