Using h18 jib

Where i live the winds are light. Usually 5-10 ocassionally 10-15 on a good day. I want to put a spinaker or hooter on my boat but cannot afford it. I was thinking about maybe buying a roller furling h18 (or possibly bigger) jib sail and use it as an additional genoa-like headsail. Attatch a spin pole to the boat and have the two jibs rigged to the spin pole. I would use it in light winds and with both other sails (m/j) up.

Would i able to rig the boat like this for less than a spinaker
Would it be worth it (in terms of additional power)
Would it work (3 sails at once)

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1971 H16 (sail #1768)

To all of you on the Hobie Forum... I love you guys!!!
thanks for all the help!

During this time of year, you'd be better off launching from Long Beach where the winds are closer to 15 - 25.

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Happy Sailing,

David