I'm a freshbooks customer who's also an ex full time freelancer. I agree with sunir. If you can follow through on your work, you're ahead of the game. Consider your target demographic and how they consider paying for things. I do mostly systems administration and web programming these days, but I have a strong IT background, if I have a client that I want who's on the fence about if they need me, I ask about their monthly costs. Usually they're paying way too much for telephone, internet, email etc. I can usually get them to leverage my price against a year of overpaying for services, but that's just part my pitch. Which is a slightly different topic.

The point is, you're worth spending the money and if they're paying you enough they're worth putting in extra effort. It's mutually beneficial.