How about building a couple of simple tools for various markets to test the response? Something that you can put together in a weekend perhaps. It really come

How about building a couple of simple tools for various markets to test the response? Something that you can put together in a weekend perhaps. It really comes down to your type of customers. Who would you be happy talking to all day, what industry do you know the most about? Then if you hit on a demand or a big community you can consider the full blown SaaS Find a group first and then learn what they need most.