In case no 1 , you most likely came off as too expensive and even tho he did ask for a "quick quote" , he probably wanted more , like "improvements" on his design. It could have been that he was dissatisfied with his existing supplier and was just trawling for others , they might have kissed and made up?
In case no 2 , you have to decide what your business strategy is , whether you are willing to invest time into a job without reward and take a chance you get the job , or be a stickler and demand a deposit up front.
Albeit its difficult , we will only do designs on acceptance of a quote , but have to provide some sort of pre quote visual or description for the client.
You cant really quote properly if you dont have at least the major elements of the job.
If you have enough work to keep you busy and dont need the customer , you can take the route where you refuse to do anything prior to deposit or acceptance , if you need the business , you then have to do the design it first thing and write off the time you put in with no reward as school fees.
What you really have to ask yourself in this regard is what sets you apart from anyone else out there. In terms of signmaking , what generally sets one apart is creativity , the ability to know what materials are suitable , to do the job with quality and deliver on time at a fair price.
In essence what will really put you above the crowd is your creativity and if thats the situation , you have to demonstrate it.
Your customer wants something to boost their bottom line , no matter what type of signage and your job is to maximise that for the customer in whgichever way you can , you are the expert , so the customer relys on you.
No use being p—d of with ppl that steal your designs and have em done elsewhere , you will never stop that and to pursue remedies is often futile , it just costs too much and creates bad blood. As suppliers to a customer , you have to eat crow often and pretend to smile and like it – thats the reality.