Disagree Boscomantico,
Fuel is a bit more expensive but not that much more.
Landing in rotterdam is € 19,- + vat for sub 2t. Not bad at all.
You do have €13 atc charges (which I only ever had in Hamburg)
Avgas is now € 2,59 (germany probably €2,29-2,39?)
Handling in rotterdam is probably 150-200 for Jason
For sub2t it is €25,- at vliegclub Rotterdam
Rotterdam really is a nice field with atc who like it when you are having fun. Often enough they will ask if you can keep up the speed .. Ifso you are nr 1 in front of commercial aircraft.
They are really good at mixing ga with commercial.
Rotterdam sounds about the same cost as Schipol for 2t plus.
I suppose I am in a slightly hybrid position in that I am flying for business but am usually the only customer. That said, what @what_next wrote is right in that convenience and efficiency do have significant value.
At 2.3t it seems like there is no real cost advantage to the other alternatives.
Thanks everyone for your help.