Bigger question ... do you want to work like this? I work a lot more/harder than I used to. I have to remember to take breaks. There are no water cooler chats in my life any more ... no chance to grab coffee with a work colleague. I try to go to meetups but it is not the same.
Suggestions: 1) Build a sweet work office. I was working with my laptop for ages and it was tough. Buy a nice printer, external monitor setup, get unlimited Internet.
2) Make sure you have buddies in the home office who can help you if something urgent comes up. VPN/connectivity issues can happen.
There are big questions I have around growth (salary, responsibility are the big ones; technical growth is okay since I put in many hours to study up).
Working from home - if you have a spouse, they need to understand you are working. Home office is best but a separate room may not be feasible.
Don't sweat talking to your boss. I did sweat - turns out it wasn't necessary. You can propose a 3-6 month trial run.
Best of luck