Not necessarily. ROI depends on the size of the capital investment, monthly refining volume, and future refining profit margins per gallon. Last I heard, Arizona Clean Fuels Inc. already has the environmental permits from the state and EPA and while no doubt some NIMBYs will sue them when they start construction, the litigation should be manageable here in AZ. The west coast is another story; I wouldn't attempt to build a new refinery out there.
Well, sir, whatever you say must be Gospel. Sorry, but I haven't time enough to comment on that remarkably ill-informed -- hell's bells, outright stupid -- sentiment.
Good luck to you in trading. You'll need it.
FReegards!