Welcome to the forum!
I enjoyed reading about your plan and the answers to it (I agree with all the things the previous posters said). My own shot at it is as follows (just to give you a perspective, I am a father of 1 and have a full-time job, plus other 'serious' hobbies as well):
- Play as many official (long) OTB games as you can. If your job/family do not allow you to participate in many tournaments, then put more hours on studying (but you will improve at a slower pace). What we read in books does not stick to our brain if we don't practice it or experiment with it. Also analyse your games afterwards as TN has noted.
- Resist the temptation for 'browsing magazines, and internet fora or following live broadcasts' as much as you can (of course some fun is always welcome, but these are hours that can be used in a more efficient way). You could replace time online by solving tactics on the ChessTempo site (it's for free-highly recommended).
- 6hrs/week is realistic, but 6 pages/hour is not in my opinion. Depending on the book I may do 1-3pages/hour. But it does not matter. What matters is whether you actually learn something and apply it to your game.
- I second the recommendation about Khmelnitsky's book. You will learn about yourself but also learn some chess in the process.
- OK, you need an opening repertoire but start with something basic and this year work only on 1. e4 e5 as you say. Your other repertoire choices could be some easy to learn, but sound systems that could be later on used as a secondary weapon, if you learn something else in the next few years. Possible choices: As White if you play 1. e4: e.g. Sicilian Alapin or Closed Sicilian, vs. d4: Noteboom or Stonewall, you get the picture..
- I don't see anything on endgames! This a good way to start: You may not get many endgames in your games, but you will learn good piece co-ordination, tactics and calculation.
- I don't quite agree with your comment that by studying openings you will also learn middlegames and endgames. You may learn some, but still your focus is greatly limited on openings.
All in all, I'd say you need to prioritise things in the following way:
1. Play games & analyse them (alone or with stronger players).
2. Do lots of tactics (ChessTempo site)
3. Build a basic opening repertoire (really basic stuff so that you won't lose in the opening, nothing more / since you have been an active junior I suppose you may already have a basic repertoire).
[4. Optional if time allows: You could focus on 2-3 books this year:
- A primer on endgames (I suggest Howell's Essential Endgames)
- A primer on middlegames (Stein's Simple Chess is very good)
- Khmelnitsky's book (only if you feel like it)
- Marin's Spanish Repertoire for Black
I don't have Marin's book, but the other 3 are rather short books ~ 130 pages each, and I think you could seriously study 2 or 3 of them within a year - say mostly during vacations or weekends]
Lastly, be honest with yourself and modify your plan if things don't go as expected. There's no need to hurry, so don't kill the fun, just spread the plan over a longer period!
Well, that's all