Thank you all for your good advice.
I did some more research myself and i found HGVC packages on Timeshare resale market for about half the price that Hilton is
selling. I asked Hilton to explain and they had some lame excuse that they have the first right of refusal (which according to the
reseller, they never exercise)and i woud not be guaranteed to be able to buy at the resale price. Yeah sure

In any case, i canceled my contract.
Was an interesting experience.