Even though July 7 to 31 is one of the lowest DVC demand times of the year at WDW, your chances of getting a standard studio are low as they often disappear before 7 months out year round. Lake view almost certainly will be open and you have a chance for theme park view. It sounds like you are planning to have one room with a great view among the two groups but you cannot shell out the points needed for two theme park views. I personally consider lake view better than theme park view and would recommend getting lake view for both, which would cost fewer points, and request higher floor. The problem with theme park view is that you need to request high floor and get the request, because if you get stuck in a lower floor theme park view room, like fifth floor, you will suffer from severe disappintement for having spent all those points on theme park view, since the main view those lower floor theme park rooms have is of a parking lot. If you get lake view, you have a much higher chance of having a high floor request granted and even if you get lower floor, you at least will not feel that you have been ripped off in points.