This is how I do it too. I bought a mini office PC and HDMI'd it to the TV. It's nothing fancy, just an i5, a wifi card and IHD GPU. I threw Kodi onto it, cancelled every streaming service I was using, and then returned to the high seas to fill up the 10TB external HDD I connected. When a new episode of something drops, I just download it and then Kodi nicely organizes everything.