A table and enough seating, lighting that plugs in, and flooring over whatever is underneath. Beds come after that, for anyone sleeping out. Everything should fold, stack or roll — it has to come out for a week and go away again for eleven months.
Prioritize the table and work outwards. Stackable chairs come out for meals and stack against the wall between them, a narrow folding side table serves and holds the candles, and cots go in only after the table has its clearance. Two feet behind each seat is the measurement that matters.
It needs to tolerate getting wet, which plastic and coated metal do and wood does not. Anything upholstered or wooden will suffer over a week outdoors. Nothing here has to be stored outdoors — it just has to survive rain while it is in use.
Spend on lighting and flooring: both transform how the sukkah feels and both last many years. Folding tables and chairs are commodities — buy sturdy rather than expensive. Cots are worth the upgrade only if people are genuinely sleeping out every night.