I spent almost 2 years trying to find investors for what some others guys in Cali launched as Gigwalk last May. Major bummer. But nobody executes "your idea" EXACTLY as you envision it so do it anyway. I have had the luxury of watching Gigwalk for almost a year - and it is a lot easier to describe what I'm doing now that I can point to another app and say, "like this, only with features x, y and z that it doesn't have". Also it's a lot easier to know how much capital you might need based on what a competitor has raised. Good Luck!