One of the things that you are also going to want to watch out for is how the business
communicates with you before you've decided to work with them for sure. Their spelling, punctuation, and overall tone should be appropriate for the situation and will also give you a clue to exactly how professional they are. Definitely don't be afraid to ask any questions that you may have in mind because it's a big deal to agree to work on a project that is so important without knowing everything you need.