This looks great - how much of it is open source, could I host it all myself? wouldn't be interested in investing any time learning if I'm locked in to hosting on some else's hardware.
Did this with policy based routing in my opnsense (pfsense) router a couple of weeks ago. egress via a specific tailscale exit node for a list of domains including Imgur.
Also browsing Minecraft mods/shaders was my motivation ha.