do you know how many times a client has told me that a project will lead to bigger and better things and it just fizzle out? As a marketing manager, this is a fairly standard conversation we have about the industry as a whole. Do you know how many times I've had the same client tell me that if I lowered my rates the 2nd job would be mine... but I've already lowered my rates to get in the door - the next job was supposed to be full price, remember - BIGGER GIG

I have enough clients AND a full time job, I don't need to add anymore but every once in a while I will on the premise that it'll be larger and nada. I can't feed my family on possibility.
I highly doubt you would lower your rates on the premise of MAYBE future work so why should I? Because my market is filled with low class idiots willing to give their work away? Guess what, so is yours... Only your market requires some capital to get off the ground. Mine just requires time.
How many of the freelancers on fiverr do you think have full jobs at starbucks or even real agencies trying to make ends meet?