You forgot the little extras
.. the main one (for me at least) is that you invariably get a faster network than your office-based colleagues, but you get to pay for it yourself. You also find out how frickin' slow Openreach can be at installing lines and ADSL. I used a MiFi dongle for a couple of weeks while I was waiting for mine to be installed and it was usable, but slow.
Then we moved house again and was offered a 40Mbps fibre link, which we had installed. Great! The only problem now was that the BT wall box had its own power supply, so I had to get a small UPS for that in case the power went off. Add that to the *other* UPS I bought just to ensure that the router and switch I also needed stay up in the event of a power problem and you get the picture..
Remote (hardware) support? Nightmare! My original desktop PC packed up when the integrated soundcard died, and I had a 600-mile round trip to pick up the replacement laptop. No, they couldn't ship it - I had to pick it up myself.
But in spite of all this I just *love* working remotely. The view from my windows is great, and I can chat to my colleagues at any time using Lync.