People invest in people. It doesn't matter if the investor is doing it on their own behalf, a.k.a angel, or if they are doing it as fiduciary for someone else’s money, a.k.a. VC. I had lunch yesterday with the guy who runs the acquisitions group for a large publicly traded company. He only buys businesses from people he likes.
Understand what Accelerators are good and not good at. Accelerators are great for helping companies develop their product, refine their key messaging, and get started with marketing. They are not great for getting good ideas coupled with good people funded. Google tells us that an online purchaser consumes over 10 pieces of information about a product before buying. Why would an investor consume anything less, or require any fewer touches? They need to have at least that much info and a well-polished demo only counts for one touch. Entrepreneurs need to demonstrate that they are thought leaders, have the drive to see the business succeed, make it easy for investors to do their diligence and relate to the investor. That takes time to develop.
Its forever(ish). As important, if not more important for the Entrepreneur, is this who you want as a partner? Just because someone is willing to write you a check doesn't mean you want them as a partner. It will be nearly impossible to remove them from your company if you choose the wrong investor. Does one meeting allow a management team to determine if this is who they want to be in bed with until there is a liquidity event?