Seems like you have some limitation (I really don’t know tailscail funnel) in your setup, and now you expect them to work around it.
Sub-paths are actually a fairly requested feature for Home Assistant. Although, they have a limitation of hard-coded paths, which they now expect us to work around. I’m actually fairly okay with that, they’re programmers who (a number of) work for free, with the exception of the few apart of Nabu Casa, and they’ve already exceeded my personal expectations it’s not like I deserve any features, but they also don’t deserve me to love 100% of their design decisions.
Yes, HAOS is great when you have one dedicated machine for it, for example a RPi. That’s the whole purpose of HAOS, as far as I understand.
I’ve admitted this already, but I seem to have totally miscalculated the ability of HAOS add-ons, and treated them like traditional Docker containers. This was my bad, and I learned the hard way, but at least now I know.
If you already have a zoo full of docker containers, then you want your Home Assistant (without HAOS) in just one more of your own containers.
I’m far from a zoo keeper. Once I setup everything on RPi OS again I’ll have just a few things for media (Jellyfin and a fork of Gonic, at least until my PR gets merged), Vaultwarden, and a home automation service (which may or may not be Home Assistant – if I can figure out a decent way of exposing it) I less services being hosted when I was on HAOS.