Ok so if I understand this correctly, the max price to accomodate 3 adults is $525 which comes to about $175 per person for a week! that is not bad at all.
Even the 1 bedroom for $325 is not a bad deal, since I plan on doing the developing in bathroom routine I would probably go for one of those.
Figure $50 a day for food etc, and add about $10 for car rental the hole trip will cost about $475 a week for lodging, food and car rental. Of course this is not including air fare but that varies according where you are comming from. I think spending $500 to $600 for a week long photo trip is an excellent deal.