elrojo isn't as fast as racemwb. Actually, I had already done this a while back when waiting to attack or send. I'd just add a few more entries to a spreadsheet and after some unknown period of weeks or months of an entry here and there, I was done. It was on W35, but the figures are the same to my knowledge. Even if not, it gives you a good idea of what a small village "costs" to build up. Without further adieu ...
For a level 20 HQ, Max barracks, Stable, Smithy, Resources, Farm, Warehouse, Wall, level 5 workshop, level 1 academy (the only level for this world), and level 20 market for a 9,658 point village. This does not include a hiding place or statue. It also assumes building everything other than the HQ from level 1 on up with the HQ starting at level 1 and already having a rally point.
TIMBER
1,923,970
CLAY
2,287,417
IRON
1,171,067
Since clay is typically the determining factor for just about everything, the 2,287,417 in clay it takes to build a village from ground zero equates to 76.25 coins. Given the increasing cost of a village as it gets bigger, taking a small village vs. a really small village doesn't make much difference at all. So, if you have around a thousand villages and take around 13 of these little villages, it will cost you a noble over taking only fully built villages. Given that you likely beat the wall to zero and a couple other buildings get damaged or aren't big enough, then you can probably bump the number to 15 or 16 of the little villages costing you a noble.