Thanks for the thought and effort that you're putting into this!
The bunk barn sounds like a good possibility - it's a low-priced accommodation, payable by the night, and space enough for a larger number of people. The only disadvantage is that there's no large communal space, so we'd have to hang out together in one of the rooms. (Problem for those who might want to sleep.)
The homestead cottage looks very nice! It has a dining and sitting room, and with the maximum number of guests, the price is good. But what happens if more than 12 want to come? They do allow additional guests in caravans, so perhaps a tent would be permitted?
The third possibility also looks nice, but sleeps only 10.
