It only rains every 7 years, so a pole bought this year should last another 6 years on top. Therefore might as well go for the cheapest option!
The heavier the pole the greater the problem of fixiing it, and the more chance of it hurting someone/thing if it does come down!
Mind you the bungees advertised on skyblue give me a thought. Presumably they basically snap because at some point on the length of the pole it is fixed and can't move. If one used elasticated guy ropes this would presumably allow te whole pole to sway and reduce the snapping opportunites?
Suppose the soultion is to stick the pole up in the garden and test different securing methods in advance of Le Mans!