I am seeking advice on the use of my Phantom 2 vision + near tall buildings. I live in a condo in the downtown area of a major midwest city. My building is 24 floors in height with a very nice wide rooftop deck at the top of the building. It is about 100 ft long and 50 ft wide. The condo is 1-2 blocks away from other equally tall buildings and 4-5 blocks from even taller buildings. I would like to take my phantom to the roof and fly it from there to get pictures and video of the city. I would think that my flight would be about 100 ft up from the deck (probably near 400 ft. total) and stay fairly close to my building. There are some maintenance objects on the roof that stick up above the deck maybe 30 ft so I need to get above them. MY questions: 1. Do you think the return home would work within that 100x50 ft deck if I had to use it?, 2. Would radio interference (near tall buildings) really be a problem? (ours is concrete and brick mostly), 3. Wind issues... but I can pick a pretty good day for that, 4. Other issues I need to consider?..