Alan is spot-on. I've heard of people who have several (expensive) machines, loads of fabric, accessories and all the accoutrements that go with a first-class sew shop. The investment tops 5-figures in a hurry. There are websites, forums and it never stops.
I've seen guys turn out some pretty fine gear, such as pack bags, pouches, zippered cases, and many custom touches. I'm not at that level, but the only thing stopping me is...me. I wanted one machine I could trust 100% to be good, strong and accurate. Spend once and be done.