I doubt whether I could homebuild a F16 cheaper then a commercially offered F16 when I need to buy the hulls of the same commercial builder.

Reason, the cost savings of homebuilding are easily offset by the retail prices a private builder needs to pay for all the gear and fittings.

Commercial builders get large discounts on these items and that is where they get their profit from. The hulls themselfs are labour intensive items and therefor relatively expensive in cost resulting in almost no profit margin on top of them.

Fittings and sails that is where companies can make a profit of beach catamarans. That and replacement parts. The latter because the bill for these is most often taken up by insureance companies, so high retail prices are not a problem.

Wouter