As far as perennial fruit crops go strawberries are a fair investment. They're a little runner vine that hops along the ground. So one plant can become 7 next year. Each plant produces about 4 to 15 berries, that ripen over a 2 to 4 week period. So it's an easy plant to get established and let them spread as a ground cover or give them an entire bed to take over. They're easy to control and transplant too. Just herd where the runner shoots land so they make plants where you want them.