Keep the lvl 1 doc
You see a lot of injuries with a level 1 doc... I would say that to set up a good training plan you need a level 4 doc and a level 4 trainer (at least). Neither should be too costly. If you keep your level 1 doc do not complain when three of your trainees go out for 2+ weeks.
I personally think that PR guys are underrated, too. If you can afford it get a level 3+.
You should only need to shell out $ for the level 4 trainer. I just bought a level 5 doctor for less than $10,000.
Run of the Mill Canadian Manager