Your reply explains the "You need to get out and vote" part, but it doesn't explain the "and if everything goes well, maybe you won't need to vote again" part. What context do you believe makes the 2nd part alright?
In context, I think it is obvious that is what Trump meant. People that have been told Trump is a dictator that wants to end democracy obviously won’t approach that quote with normal grace they afford others.
"and if everything goes well, maybe you won't need to vote for me again"
Trump would be term limited, so they would not be able to vote him in as president again anyway. That is why this interpretation does not make sense to me.
So a promise to permanently and irrevocably change the country? If it is truly one off that is what it would have to be, which is not possible via normal legal mechanisms in the USA.
I can't imagine where they'd get that idea from. Certainly not from Trump saying he'd be a dictator on day one to close borders and a few other things. But not to worry, "after that, I won't be a dictator".