MD Not Taking Labs Until After Applying -- ER Scribe

I've taken a few labs but I want to take most of them after applying (next year) because I've accepted an ER scribe position that will take up 20+ hours a week, on average. I figure the lecture will give me most of the info I need to study for the MCAT and all, but how will med schools see this? I really want this position because I want to learn what being in the hospital is like and have the opportunity to see how doctors do what they do every day.

Also, is there a limit to how many classes you can apply to med school without?