I'm a student. For me to be able to launch a start up right now, I need outside capital for living expenses. Otherwise, I need to graduate and work for a year to save enough to bootstrap myself.
If you are DEAD SET on building something, you WILL find a way around these problems because they are pretty small in the bigger scheme of things.
Lets look at it in reverse: why do so incredibly few people execute the most obvious, high potential startup plans? Because there are innumerable costs that those who are already at the top have lost their ability to accurately consider.
All I can say is, good luck all.