This is what happens when you place a "contact us for a quote" form on your website. You will get a high percentage of requests that lead no where. Do you have any experience with a company that receives RFQs to land business? You will spend a lot of time answering all of the questions and digging around to ensure you can actually do what is requested spending days/weeks on it. Only for the work to go somewhere else. In fact, a lot of places require multiple quotes for work, so when they have someone they know they want to work with, they still have to have other companies spin their wheels. They have no qualms about it knowing they are wasting the other companies' time. It's pretty much how things are done.