Do we really need a start-up incubator (or) an investor for a software product?

At the moment, I seem to read a lot about so many innovative software products (or) mobile apps , and if it happens to be really useful, there seems to be a buzz about it for a week, and your RSS reader is filled with news. Most of the articles covered is how many millions a company has raised in funding, etc…<p>My question is this - being an app developer, I do have some ideas with good product, and I have a team of 4 people who help me out (both in the technical side) and the finance side. We hope to start a venture on this, and be a "lean" start-up. Project is done with Xcode, and we have a lot of web services, and they are not really too expensive to set it up, and all the people in the team do not really have a salary of some sort. We just plan to take an equal portion of the company and go ahead.<p>Do we really need a start-up incubator (or) an investor ? I know it depends on the product and stuff, but, for a software product, which can be setup in 1 year with some investment in hosting services, and development resources, etc … I just want to know why people think - WE NEED AN INVESTOR TO LAUNCH THE START-UP ! Is that really so ?<p>I know that it gives the start-up some sort of publicity when Mashable blogs about it like - "This company received 10 million dollars in funding .. (blah blah)". But honestly, what are the resources that you get from pitching and getting some funding ? For a software product, do you really need funding ? What is this craze ?