The only point of the table is to make HU commercially viable in a live setting. 1 dealer. 8 players, so it has the same overheads as any other table.
In terms of game speed it could be maketed as "turbo" HU tables where dealer has a timer and each player gets 20 seconds max per street. it will probly run quicker than most live FRs.
It would be very easy to make a custom HU table the same size as standard tables. Standard tables could probably be utilised, just need 4 buttons.