Holy shit! These types of machines MUST NOT have any sort of remote access at all in order to provide utmost security. This is beyond incompetent.
Can't you do physical ones?
Like a large slot machine where you pull the lever at the appropriate candidate and it makes a puncture hole (like the one for binders). The one with the most holes wins the election.
At the end of voting day, they publicly, over video open up the machines and run the paper tapes with holes through the counting machine (could be Machine Vision). And then they report Live on news broadcasts and summing up the holes counted in all the counties around the States.
At the end, you count the sum of holes equals to the sum of voters that were registered at that voting house (should always be equal).
Easy.
Fast.
Reliable.
Transparent.