jumpcross do a starter pack for £88 for there safer my design set but you do have to provide your own poles but wooden ones should only cost about £12 each....
Your budget for poly jumps is too low - you cannot buy them trade for that. You might find some second hand, however bear in mind that most second hand poly jumps are stolen!!
£185 is the price on their website which is I why I used it as an example, obviously I would have to pay delivery on top which takes it to about £200. I may try jumpcross.
You can get poles from a local builders merchant (10ft) for about £7 each - And paint them yourself.
(the planks and big red blocks belong to the yard, but the rest are what I made and have collected)