Doctor
I will never play a game with a level 1 doctor. The game I do it'll be a 5 week injury to a star player/main trainee.
PR
but since I have been selling out almost all my tickets for a while this just never seemed worth it to me
Then you're losing income every game you don't expand. Expand until you're not selling out. Hiring a PR will make it sell out again (provided you won your away game).
Plus the specialty of PR is an easy few points per game at home or on the road for really cheap. A necessity for the playoffs or key games.
Trainer
Get one.
I have 1 player left over from when I created my team.
He has gone from a 5.0 rating in his first game to a 10.5-11.0 recently after 3.5 seasons, from a lot of 2 position training and some 1 position training. He should be an all-star candidate next year.
For a brand new player, though, the thought of not paying for a doctor is not at all a bad idea. The new team should not have any players who are significantly of more value than others, nor any really high-dollar trainees, nor do the immediate season's results matter significantly, so an injury is annoying but hardly a concern to the team's long-term development.
I do think the idea of picking up a level 2 PR manager with the appropriate specialty for key games or the postseason is a good move when and if necessary. I don't imagine that the new team will have really any key games for quite some time though and I can also see the case for keeping a level 1 guy around and just picking up the 2 for those key games.
I have to agree that a trainer is almost mandatory - trainees are cheap and plentiful, and while one does not have to go for the super potential players who will one day become U21/NT candidates, picking up guys that they can improve and move up a level or two with is in a team's best interest.