I'm willing to sacrifice quality for speed though...  But when I look at the videos "Samaritan" done with UE3 and "Infiltrator" done with UE4 it's easy to think there really wouldn't be much of a sacrifice, and a huge gain in time saved...

But then I think what if I started getting revenue from Youtube or through sales of digital comics...  Would I then need to buy commercial licenses of the engines even though I'm not producing games or distribuing any code?