To put it bluntly, yes, you are naive. That's OK though, there are plenty of successful businesses that are started from that place. You should do what you woul

To put it bluntly, yes, you are naive. That's OK though, there are plenty of successful businesses that are started from that place. You should do what you would do in any business situation - get multiple quotes and offers, and compare. Interview multiple candidates, and developers, and rely on your intuition. Good developers tend to be clear in their requirements, have a good grasp on technologies, and can consider other technologies for their benefits or flaws. You don't need to 'run away' from anyone because they suggest one thing over another - just make sure that you are talking to an engineer who has had some experience, and doesn't recommend a 'one size fits all' solution. Then again, expect to pay a lot for a good engineer. It's ok if your system is a bit crap if it gets the job done, and you make business. Grow the business, and fix it later.