The WC calculated that LHO left New Orleans with about $215, and he had approximately $130 when he arrived in Dallas. The trip, including transportation, lodging, food, and miscellaneous expenses, had cost him a total of $85.
So what did he do with the missing $85? If it wasn't spent on the Mexico City trip then where did he spend it?
He spent that summer in NO agitating/protesting on behalf of Castro. He's saving his money. Why? Marina explained why. His subsequent actions explain why.
Duran testified that he showed her his FPCC card and told her about his efforts on behalf of Castro. In effect, proving his "revolutionary" credentials in an attempt to persuade the Cubans to let him in (and if they did decide to let this supposed impostor in then what was the purpose of impersonating him? What does this impostor do next? Go and do what? Refuse to go? What is the end game here?)
The money, his activity on behalf of Castro, his long time adoration for Castro, he tells Marina about the plan (she goes to the USSR; he goes to Cuba; then he sends for her), eyewitness accounts, physical evidence, circumstantial evidence...it's a pretty long list. Yes, there are "gaps" - such as the account by Azcue - but if you weigh the evidence he went versus the evidence it wasn't him then it seems to me you have to conclude he did go.
Now the question is: Was he impersonated on any of the phone calls once he was there? But that's another question for another post/thread.