I truly miss the old sticker visas from the pre-Covid era... our visa agent routinely got my Non-Bs turned around in ~72h with no finicky poorly-designed websites involved or three week delays.

In any case, no one cares if your actual plans match the ones you submit. So just make a dummy cancellable hotel booking for the whole trip and upload that rather than trying to figure out how to make the form accept your actual plans.