Hey Riverdiver
I'm learning PLO at the moment, let me tell you what i think,
Basically at the minute, in my opinion, if you are willing to really study hard and improve then PLO can be more profitable than NLHE because people are still jumping on the PLO bandwagon and the game is getting more and more popular each day, there are a huge number of fish around at the moment, so you can make a lot more $. Another thing for me is that PLO is just a million times more fun.
However, you need HUGE balls to play ♦ the variance can and will be super sick at times so you need to make sure you can deal with this or you will have to get used to it pretty quick anyway. Because of this you can also spend a lot more time breaking even, even if you are constantly getting your money in as favourite.
In the end you just need to pick which game you have the most fun playing because when it comes down to it, thats the game you are gonna have the most enthusiasm for and determination to become the best you can be.
Hope this helps let me know if you need anything else
Carl