If you get ten paying customers, you've got a pretty sustainable business. I wouldn't worry too much about going to enterprise, because enterprise gets really big. You could put a number like 500 dollars in that range. And it's also people that have a bigger problem that needs to be solved and i think that points to the pain when they're willing to spend more rat right?
Nate's looking for SAAS ideas, Josh helps narrow the search with some clever questions any founder can use to hone their search.