In the business plan for MARINEA a timeline was suggested.
As soon as funding is available the construction of a 70m diameter lens shape will take 6 months.
The picture shows the “general idea” of such a structure.
The time frame of 6 months is given for “shell building only” what means it does not include the cables, tiling, tubing and other “outfit” items.
The outfit of the ambients will go along the same cost and time parameters as outfit of land based buildings develop. Numbers can be filled in from standard constrution cost tables we will not feature a “important diference for being on the water” in the “outfit phase”. Tiling and tubing a bathroom situated in Marinea will take the same effort time and materials that tiling a bathroom in a land building will cost. Nothing will be “special yacht outfit” at “yacht prices”.
To make this point conveniently to investors we can handle MARINEA like a layer cake where we do floor by floor creating numbers and facts about “cost of building per square meter floor space” and cost of outfit per square meter average. Each floor, ambient can be designed as a “waypoint of construction” part of a waypoint plan that let us and our investors keep track if we are or not “within the waypoint plan”.
Each construction waypoint can be connected to a event of partial budget release.
I suggest to put the total construction budget on an ESCROW account and have meetings to discuss and agree waypoints every few weeks.
The first steps in this waypoint / budget release plan can be a few hundred USD only what allows to design the whole building start as a “Tip your toe in project” with extremly low risk levels.
The investor question “what happens if everything goes wrong in Cartagena” can then be answered simply with : "We loose a few hundred USD - and the project goes on in a new setup somewhere else.
This should give everybody peace of mind in the construction.