Can you earn enough on HP alone or should you try using several ad revenue sharing sites?

Personally, no. I have other things I do that are mostly public service, but they generate traffic off of each other. I think it is always wise to keep eggs in several places...you never can be sure which one will be the Golden Egg.

Good Luck - Whatever you do, have Fun!

I suggest mastering one, build up a good amount of content and followers on hubpages first. Then move on and master the next one and use hubpages to promote you profile on the other site. Then move on to number 3 and so on.

Trying to get started on 4 different sites at the same time will drive you crazy. Get established on one first and then move on.

While it is possible to earn appreciable amounts on Hubpages, I also wouldn't do just this. Personally, I write on four different affiliate sites and each has its own strengths and weaknesses, and I also have my own websites that I'm working on developing that can drive traffic to those articles and vice versa. Some niches that perform better than anything else here on Hubpages are duds on other sites, while my best topics on those sites haven't done much at all on Hubpages...it's worth doing some experimenting to see which of your ideas will pay off well here, and which would be best-served on other sites.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.