Since I'm home with an autopilot that won't power up...*grrr* (another one on order from Defender) I thought I'd check in.
I recall reading that a number of cruising guides recommend 1/2 a gallon of water,per day per person. I know that's pretty generous, for me. I probably drink more like 1/3rd of a gallon. But anyway, so if we stick to that 1/2 a gallon a day, and use up one gallon on day 10 for a sponge bath, that's a 40 day supply.....assuming you don't have a contaminated tank or something.
I bet you can get to Hawaii under jury rig in 40 days. If you're carrying two spinnaker poles, I wonder if maybe a better investment in time and $$ would be to get a sleeve made for the poles so you can cobble together a 20+ foot jury mast in case of total dismasting. With that you can hoist a #1 or #2 headsail, if not properly aligned (since your boat is fractional) at the very least, sideways, and make reasonable progress downwind. I have an aluminum sleeve on the boat made up so that I can link my pipe-berth poles using the sleeve and pop-rivets into a mast that will have about a 20 foot hoist.
1968 Selmer Series 9 B-flat and A clarinets
1962 Buesher "Aristocrat" tenor saxophone
Piper One Design 24, Hull #35; "Alpha"