Well i will add little. Both are still ok and good. Building from scratch is cool, it gives one energy ,takes out fear but sometimes reduces input since you know even if you lose any money, you owe no one. Building from scracth also brings out the best, that latent talent in every being. Building from scratch has a very high young modulus but speaks great future potentials.

The other part which is raising money for a business seems not cool. Its injects unbalance inputs, liberates unnecessary seriousness in a man. Makes a man place judgement on output and not of quality. Seems not cool to me.

In summary, the best is setting a sponsor group where everyone will gain according to his input. If it fails, all fails, if it succeds ,all enjoys.
This way, many heads must make the biz succed