Great question!
I have pondered this myself alot. I've also done a ton of research into this.
The subject of Vinyl wraps vs airbrushing is an awesome discussion.
I'm like you, no expert airbrusher, but I sneak by by using tricks I pick up from all the pros. I have a pretty solid graphic arts background, which helps.
I consider myself a kind of a new age thinker when it comes to this subject.
I think the next big thing is going to be a mix of both worlds, print graphics and custom paint.
Wraps will be king of the superfast big graphics for a while but it still has some serious limitations. Vinyl has some serious problems around complex curves and tight spaces. Paint doesn't have this problem. I think what you'll see in the near future is custom painted backgrounds with a super thin overlaid printed graphics covered with a buffable clearcoat paint layer.
I think this would be the ultimate custom looking job.
Paint can still do things that print cannot. Specifically flames for example. Print will not be able to match airbrushed flames for a while in my opinion.
I think you be fine jumping into any aspect of the custom world. You'll learn all the tricks of both worlds by just doing it.
I'd love to hear what the pros have to say about this.
Tony D.