Halloween is quite an important commercial event in the United States (Annual US Halloween sales amount to US$8.4B, about the entire NASA manned space budget), but the maritime community has had a hard time breaking into this industry (The pirate costume licensing fee thing never worked out). Still, that does not mean there are no opportunities.
Possibly the best business opportunity is pumpkin boat building. Pumpkin boat building has been taking place since at least 1996, but the level of technical improvement has been disappointing to say the least. It is obvious that naval architects have not been involved in the development of this type of vessel. It probably makes sense for the Naval Architectural community to have ignored pumpkin boats for the last two decades, but now it appears the moment has come where we should start to look at these vessels as a potential business opportunity since the construction material appears to have matured.