I think adding a fixed contract for 3 months is a good idea.  I would even suggest 25% or 30% for approval.  This would be locked after the initial vote so a higher % is good.  I also like the idea of limited contracts to 30% of the budget.  With the volatility and possible growth we are seeing, I suggest we don't look at the 6 month or 12 month contracts until we don't change value by more than 25% in 6 months.

The suggestion for paying Dash out in the equivalent of fiat and varying the duration of the contract is interesting.  The key is picking a reliable fiat/dash and maybe that needs to be a manual adjustment every month as we have seen exchanges come and go.

We should also consider using a 3rd party to 'bet' on the future price of Dash.  There are a few options for smart contracts based on the blockchain and there could be a few big players that would want to take the risk.  My opinion is that if there is a sizable exchange needed with fiat/dash that it goes out to bid and the best option is taken.  Maybe the vender gives the best deal, but more likely a crypto investor is going to value a future price higher.

We also need to be aware that Dash has a nearly fixed total supply where Fiat is nearly exponentially created....until this debt deflation implosion we are having.  When all the fiat debt is finally valued at 0, anything other than Fiat will explode in price.  There is a real possibility of some exciting price jumps to the positive and proposal owners should keep that in mind when creating contracts.  I would expect any 3rd party that works with us to bet on the fiat forward price of Dash, would anticipate a price rise.  And likewise masternode owners should anticipate some price appreciation with Dash and vote on proposals accordingly.  (not giving financial advice just going by past performance.  Past performance does not necessarily guaranty future results....blah blah blah.)

I also disagree with a general slush fund to use for future proposals.  This exposes the fund to misuse and theft.  Any funds taken from the budget should be used or saved for a specific purpose now or in the future.