I thought I'd throw in a tidbit...

Many customers don't have a budget, because they are not sure what exactly they want. This could mean they want a 100" Stewart screen and great projector installed for $2000, or it could mean that they are not sure what they are willing to spend, and simply need to discuss a bit what features they are considering, and what price points those might be.

Usually a bit of discussion around price points for various features will help good customers settle on what they want, and a budget.