Below is an analysis of your three proposed construction paths, plus several additional options you may not have considered. The goal is to minimize capital risk while you prove the market, then scale.
| Option | Pros | Cons |
|---|---|---|
| 1. Build complete in China | Lowest unit cost. Mature aluminum yacht yards (Guangzhou, Zhuhai, Qingdao). Single QC location. Robot welding already in place at larger yards. | Delivery is the killer. A 70 ft triangle with a ~35 ft beam is too wide for a container and awkward as deck cargo. A trans-Pacific + Panama delivery under its own power is possible but slow, risky, and undermines your "small waterplane area, soft ride" pitch in open ocean on a maiden voyage. Also: China export VAT refund issues, and warranty service is 10,000 mi away. |
| 2. Knock-down kits from China, assemble in Caribbean | Containerizable parts = cheap ocean freight. Local assembly creates local jobs, easier warranty/service, customers can watch their unit being built. Your design is already modular (three identical foils, bolt-together truss). | Caribbean shipyards with robotic aluminum welding are essentially nonexistent. You'll find skilled manual aluminum welders in Trinidad, Curaçao, and the Dominican Republic, but rates and throughput are lower than China. Customs/duty handling across islands is painful. |
| 3. Own shipyard once volume proven | Right long-term answer. Full control of quality, IP, and margin. Robot welding pays back fast at volume. | CapEx is high (welding cell, 5-axis router or plasma, aluminum roller, paint booth, covered assembly hall, lift/travel lift). Don't do this until you have 8–12 firm orders in hand. |
This is probably the sweet spot for your first 5–20 units. The watertight structures — the three foil legs and the underside floor pan of the triangle — are the only pieces that truly need precision aluminum welding. Have those built, pressure-tested, painted, and containerized in China. Everything else (truss frame members, glazing, interior, solar, thrusters, stabilizer airplanes, davits, railings, decks) can be bolted/riveted/Huck-bolted together in a Caribbean yard with no structural welding required.
Yards worth contacting for final assembly (no robot welders, but real aluminum experience):
None of these currently run robotic aluminum welding cells. If robotic welding matters to you, the nearest realistic options are in Florida (Derecktor, Brevard, several smaller aluminum boat builders along the Gulf) or Louisiana (crewboat/OSV builders like Metal Shark and Breaux Brothers — they absolutely have robotic/automated welding for aluminum).
Metal Shark, Silver Ships, Gravois, and Breaux Brothers build aluminum hulls daily, have robotic/automated welding, and are a 3–5 day delivery to Anguilla under power (or a cheap yacht-transport deck load from Ft. Lauderdale). Unit cost is higher than China but total landed cost after freight, delivery crew, and warranty logistics is often within 15–20%. For a first production batch this de-risks enormously.
Whatever path you pick, make the boat demountable. If the three foils unbolt from the triangle, and the triangle splits into three trapezoidal sub-assemblies at the corners, the entire seastead fits on one conventional flat-rack ocean shipment or on a single yacht-transport ship (Sevenstar, DYT). This gives you optionality: build anywhere, deliver anywhere, and do warranty work by swapping a module instead of hauling the whole vessel.
Don't build in China and try to deliver complete vessels across the Pacific — the delivery logistics will eat your margin and your reputation if one goes wrong. Don't build a full shipyard in Anguilla until customers are waiting. Instead, start in a US Gulf aluminum yard to prove the product, move to a Chinese-kit + Caribbean-assembly hybrid once the design is frozen, and only vertically integrate once your order book justifies it. Design the seastead to be demounted into containerable modules from day one — that single decision keeps every option open.
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