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Certainly depends; and it depends on traffic volume!
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Definitely something to consider; many folks (myself included) use a free/cheap VPS as the endpoint, and reverse proxy to home, via some VPN (WireGuard in my case). Works well, and lots of guides online.
Not parent, but I used ARM SBCs for a bit, and while it was nice, my x86 experience with a nuc has been much, much better. HW acceleration works on some RPIs, and sort of worked on my Orange Pi 5+, but only when using an ancient kernel which had some hacks (like, kernel debug messages saying “DISABLE THIS FOR RELEASE!”). And afaik RPI 5 doesn’t support hw encoding (not to mention no SSD support).
Basically, my experience was that the hardware was neat if sometimes limited, the energy consumption was great, but the software/kernel support…ugh. YMMV of course.