There are some nice new builds in my eyes,
http://link.marktplaats.nl/635942829
And also nice 'rebuilds'
http://link.marktplaats.nl/643215642
This is what I'm most probably going to do with my 26,4m barge:
Loading Image...It might provide a 'fresh' idea.
Old boats to convert in the 30m+ size are generally cheap, so you might find it interesting looking at them, some are still in excellent condition after 100 years, they won't fail on you now :)
http://fikkers.nl/ned/woonschepen/info/2554/
Partial build, always interesting (38m!):
http://fikkers.nl/ned/woonschepen/info/2452/