What kind of proposal do you send them? When they call do you answer the questions, then send a proposal later? This happens a lot to me from a couple of clients... usually they are emails with ""a few"" ""quick"" questions... many times they are in the form of possible future projects (that 99% of the time never happen).... then there are many rounds of follow up emails and questions and a couple of more rounds of ""just to clarify"" emails.