I would say initially doing some "upset recovery" type of training is a good idea. My college did it and it was a great couple of lessons(flew in a Dehaviland Chipmunk). Now if you really get the bug, flight instructing in acro I'm sure is just like regular, you can't count on income, so finding some 2nd source of income would be a good idea if you were to do that on a full/part time basis. I'd love to do it myself, but it's a lucrative market and you really got to do a lot before you can bring any income back out of it.