If you want a small investment, a used bow can be had for anywhere from free to 100 bucks.
My current recurve was free because a guy stopped at the motorcycle shop and gave it to one of the guys who worked there because "his kids would kill each other with it." The guy who worked there, one of my friends, gave it to me. It's one of the best recurves I've ever had and was made sometime in the 50's by a bowyer of unknown origin.
Put an ad in your local classifieds. Lots of people are selling off stuff right now. Maybe try craigslist. Most bows never get shot at all or that much. So, chances of finding a really nice one on the cheap are good.
Since you've shot before, you have an idea of the draw weight and overall length you need.