Noted. And I remember there were several NPCs that would train skills up several points apiece. Still, most players couldn't max too many skills in a single playthrough of FO1 or FO2, even if you count "max" as 100-120. Though some skills required 200 points to pass certain skill checks in the game . . . .
so how easy will it be to:
max one combat skill, repair, science (early), and lockpick (very early).
have medicine, speech and barter at 50 or 75
and not give a crap about sneak, survival, or the other combat skills
with an IN of no more than 7, educated, and not taking into account skill books?
Well, I recently stepped through a character leveling up using my math using a spreadsheet, not taking into account skill books.
I started with INT 8, and took Intense Training (INT) for my first perk at Level 2. I also took the Educated perk next at Level 4.
Focusing on only raising 2 skills, it took until level 10 to max them both out. That is with putting 20 skill points or so in a third skill along the way, so theoretically you could max out two skills by level 8 or 9, keeping in mind that this is an INT 9 character. You would have 3 less skill points to work with every level, so just focusing on 2 skills, it could very well take you until level 10 or 11 to max them both if you didn't put points in anything else.
In my build, to max all the "core" skills I wanted that fit my vision for the character - Guns, Sneak, Lockpick, Speech, and Survival - took me until Level 24. By level 30 I was able to max one extra skill I hadn't planned on or put any points in, dumping all my skill points for the last 6 levels into it. Keep in mind you will be getting 87 less points by level 30 than my build, so you will only be able to max 5 skills.
Of those skills you listed that you wanted, you can max one combat skill, repair, science, lockpick, and put 50 points each in medicine and speech by the time you hit level 30. You will not have the points (without skill books) to get another skill like barter to 50 or 75.
As for how early you can max a skill, level 10 or 11 for 2 skills (like Science and Lockpick) or level 6 or so if you pour all your skill points into one skill. I tried to rush to max skill in Sneak and Lockpick as early as possible, and as you can see from this post, it wasn't necessarily "early", and not "very early", even though I had an INT of 9 and the Educated perk.
Damn, so I can't make my Chick Norris character?
Maybe DLC will raise the level cap or add more skill books?
Either way this will make the game easier since you can focus on certain skills.
Nope, no Chuck Norris I'm afraid. My best advice to everyone is not to try and spread out your skill points. That tactic will come back to bite you by keeping your character weak for most of the game and ensuring they are never truly good at anything.
They won't be raising the level cap with DLC. Sawyer and Pete Hines have already stated in response to this question in interviews that level 30 is already a very high level cap, and the difference in power between a character at level 28 and how powerful that character would be at level 31 is negligible. (Hines) In their opinion things already start to get too easy for you at level 30, and the focus of the game with its definitive ending, multiple critical paths, and limited skill points is to encourage multiple replays, not to continue slogging along forever at level 30 hoping for an increase in the level cap.