You don't need a pumpkin farm, just an ordinarily sized garden and $6 worth of seeds:

https://parkseed.com/dills-atlantic-giant-pumpkin-seeds/p/05...

A plastic kayak would probably not survive the mold-making process, but that's fine, you can get a kayak either used (abused) from a local livery for dirt cheap depending on your bartering/scrounging skills, or a low-quality new one can be had for under $200 at a big box store, and simply be cut off the pumpkin.

I wonder if it would disqualify you to coat the pumpkin in a thick layer of Line-X:

https://www.popularmechanics.com/adventure/a22652/bedliner-s...

I live right next to dills farm! There's recently been a controversy where protester have been trying to change how the water in a local lake is managed, and the lake have been completely shut down (as in it is now a dust bowl unless it's rained recently), so we can no longer have our yearly giant pumpkin boat races.

What's the feeling in the community when pumpkin boat season comes along? Sounds like a bunch of fun