My Dear friend.
Much wisdom comes from old China.Maybe this also goes for my own experience : Easy coming - easy going ! This goes whether we talk about women or money !If You have nothing to loose, I recommen you to go ahead with the 6 appartements. As you already know from Sønderborg is the proces very exciting and experiencing.
I personally ecperienced how to invest - and loose - around 5 mill. Dkr. in Sønderborg.
However I also experienced many years of friendship with You, and got many other fine experiences.
The very positive obout your project is the situating close to the sea.
Selling attractive real estate succesfully needs 3 thing : Situation, Situation, Situation.
The bricks, timber ect. means less.
Maybe it would be more interesting to sell some of the appartments as a Timeshare Project. This is often very profitable. You get cash flow before the cost. It also generate money to the area, when the Timeashare owners buy local products ect.
Study Timeshare business.
As an experienced seller and business man you know how to sell.
Just do it.
All the best wishes from a happy man."