Treasur,,, here are my thoughts on accommodation:
#1, #4, #5 - are my picks if we only need one house. They all have 5 bathrooms and sleep either 12 or 13 (maybe).
#1: is the priciest but it's also right at the beach, is very luxurious, and has some great views. This would be my choice. Sleeps 13 max. even when maximizing the 2 per room opportunity.
#4: cost a bit less than #1, but it looks like its a couple of blocks from the beach, it's luxurious but not as much as much as #1 and it doesn't look like there are ocean views. I'm not sure how to fit 13 people sleeping in the house. I can see 12 people and that is maximizing the two per room opportunity. The other beds cannot really be shared - double bed, 2 king beds (well maybe shareable,,,). I don't see where the 13th person will sleep unless there are 3 in the super king size bed? And I am assuming that 2 bunk beds means 1 bunk bed for 2 and another bunk bed for 2. If it doesn't mean that, then I can only see room for 10.
#5: is also nice and on the beach, but,, while I was looking at the availability suddenly the 18th and 19th days grayed out which means someone just booked it. So unless we pick a different week, this one is out.
#2,#3 and #6: none of these have enough bathrooms if we all stay in one house.
But,,, if we need two houses, then my picks are #2 & #3 over any of the other houses. Enough bathrooms (3 in #2 and 4 in #3) and both cheaper by quite a bit than 1, 4 or 5. Possibly more opportunity to get a solo room in these houses too.
It's going to be tough to choose a house or houses until we know more about who is coming for sure, and is prepared to pay a deposit, and also who wants their own room and who is okay with sharing (and saving some money).