Hi Dennis,

There are quite a few 2nd cats for sale that will meet you needs:
http://kopen.marktplaats.nl/watersport-en-boten/catamarans/c981.html

I would look for a place to leave the cat with the mast up instead of trailering everytime you want to go for a sail, there is a big club in Hellevoetsluis and I know of some others in that region.